Changes in version 2.1.6                        

  - Now geom_tiplab() works with unrooted layouts (ape, equal_angle and
    daylight) (2020-04-23, Thu)
      - https://github.com/YuLab-SMU/ggtree/issues/292
  - bug fixed of layoutEqualAngle (2020-04-09, Thu)
      - in tibble v=3.0.0, df$x = NA will store df$x as lgl variable and
        assign numeric value to df$x will throw error. Now change to
        df$x = 0 in layoutEqualAngle.

                        Changes in version 2.1.5                        

  - bug fixed of calculating inset width and height
      - https://github.com/YuLab-SMU/ggtree/issues/289

                        Changes in version 2.1.4                        

  - import aplot::xrange

                        Changes in version 2.1.3                        

  - move xlim2 and ylim2 to aplot package (2020-03-30, Mon)
      - https://cran.r-project.org/package=aplot
  - remove mutate_ as it was deprecated in dplyr (2020-03-25, Wed)
  - fixed mutate bug caused by new version of dplyr and tidytree in
    daylight layout (2020-03-16, Mon)
      - https://github.com/YuLab-SMU/ggtree/issues/282

                        Changes in version 2.1.2                        

  - expand_scale was deprecated in ggplot2 v=3.3.0, import expansion
    instead (2020-03-12, Thu)
  - bug fixed of determined layout for ggplot(tree) + geom_tiplab()
    (2020-01-26, Sun)
      - https://github.com/YuLab-SMU/ggtree/issues/272
  - set unrooted layout to use coord_fixed by default (2020-01-25, Sat)
  - if layout = "ape", use ape unrooted layout
      - https://github.com/YuLab-SMU/ggtree/pull/273

                        Changes in version 2.1.1                        

  - export geom_highlight as an alias of geom_hilight (2020-01-08, Wed)
  - set clip="off" for all layouts (2019-12-06, Fri)
  - not passing fontface if geom is image or phylopic in geom_tiplab and
    geom_nodelab (2019-11-29, Fri)
  - import and re-export guide_legend, scale_colour_manual,
    scale_color_manual, scale_fill_manual and margin from ggplot2
  - offspring method for ggtree object (2019-11-21, Thu)
  - fixed revts to work with collapse (2019-11-18, Mon)
  - convert roxygen documents using markdown (2019-11-01, Fri)
  - extend xlim2 and ylim2 to support discrete scale.
  - xlim2 and ylim2 to uniformize axis limits of ggplot objects
    (2019-10-31,
        Thu)
      - https://yulab-smu.github.io/treedata-book/chapter7.html#composite_plot
      - https://yulab-smu.github.io/treedata-book/docs/chapter10.html#axis_align
  - fixed fontface warning message when align=TRUE in geom_tiplab
    (2019-10-30, Wed)
      - https://github.com/YuLab-SMU/ggtree/issues/260

                        Changes in version 2.0.0                        

  - Bioconductor 3.10 release (2019-10-30, Wed)

                       Changes in version 1.99.1                        

  - bug fixed of geom_hilight for tree$edge.length = NULL (2019-10-16,
    Wed)
      - https://groups.google.com/d/msg/bioc-ggtree/GULj-eoAluI/Llpm-HbfCwAJ
  - fortify method for igraph (only work with tree graph) (2019-09-28,
    Sat)
  - ggdensitree (2019-09-11,
        Wed)
      - https://github.com/YuLab-SMU/ggtree/pull/253
      - https://github.com/YuLab-SMU/ggtree/pull/255
      - https://yulab-smu.github.io/treedata-book/chapter4.html#visualize-a-list-of-trees

                       Changes in version 1.99.0                        

  - prepare for ggtree v=2.0.0

                       Changes in version 1.17.5                        

  - fortify methods for hierarchical clustering objects, including
    agnes, diana and twins (2019-08-30, Fri)
  - now geom_hilight supports unrooted and daylight layouts (2019-08-28,
    Wed)
      - by calling geom_hilight_encircle
  - update geom_motif according to the change of gggenes and allow
    labeling genes (2019-08-27,
        Tue)
      - https://yulab-smu.github.io/treedata-book/chapter11.html#genome-locus
  - re-implement geom_strip with more robust support of labelling strip,
    either input taxa using name or id.
  - support phylog defined in ade4 package (2019-08-14, Wed)
      - https://yulab-smu.github.io/treedata-book/chapter9.html#phylog

                       Changes in version 1.17.4                        

  - now geom_cladelabel supports unrooted and daylight layouts
    (2019-08-14, Wed)
      - by integrating geom_cladelabel2
  - defined nodelab method for ggtree to convert node number to label
    (2019-08-09, Fir)
  - redefined nodeid as S3 generic in tidytree v=0.2.6
      - change the original function as a method for ggtree
      - move the nodeid function for tree object to treeio
  - defunct gzoom function
  - introduce rootnode parameter in geom_tree with default = TRUE and
    behave as previous version (2019-08-08, Thu)
      - the invisible root to itself line segment have advantage for the
        number of line segments is consistent with the number of nodes.
      - if rootnode = FALSE, there will be no line segment of root to
        itself.
  - extend gheatmap to support collapsed node (2019-08-06, Tue)
      - https://github.com/GuangchuangYu/ggtree/pull/243
  - support hclust and dendrogram (2019-07-31, Wed)

                       Changes in version 1.17.3                        

  - remove re-export treeio parser function, user now need to load
    treeio explictly (2019-07-24, Wed)
  - export layout_circular, layout_fan and layout_rectangular
  - layout_dendrogram and
        theme_dendrogram
      - https://yulab-smu.github.io/treedata-book/chapter10.html#dendrogram
  - scale_x_range for adding second x-axis for geom_range (2019-07-23,
    Tue)
  - change branch.length parameter to center for geom_range

                       Changes in version 1.17.2                        

  - extend expand according to the change of collapse (2019-07-11, Thu)
  - mode parameter in collapse
  - geom_tiplab now works with 'circular' and 'fan' layouts (2019-07-05,
    Fri)
  - geom_inset for adding subplots to specific nodes (see also the inset
    function introduced in v=1.3.8)

                       Changes in version 1.17.1                        

  - facet_data to extract data used in facet_plot or geom_facet
    (2019-07-02, Tue)
  - continuous parameter in geom_tree to to continuous color edge from
    parent to child (2019-09-25,
        Tue)
      - https://yulab-smu.github.io/treedata-book/chapter4.html#color-tree
  - root.position parameter for fortify and ggtree (2019-05-27, Mon)
  - geom_facet, a geom layer version of facet_plot (2019-05-23, Thu)
  - update scale_x_ggtree, now we can use gheatmap() + scale_x_ggtree()
    (2019-05-22, Wed)
  - extend xlim_expand to work with ggplot2 (2019-05-20,
        Tue)
      - https://yulab-smu.github.io/treedata-book/chapter9.html#xlim_expand
  - add legend_title variable in gheatmap (2019-05-16, Thu)

                       Changes in version 1.16.0                        

  - Bioconductor 3.9 release

                       Changes in version 1.15.6                        

  - compatible with range is NULL in geom_range (2019-04-27,
        Sat)
      - https://groups.google.com/d/msg/bioc-ggtree/yNzjtioVVGU/MCh3MPl_CwAJ
  - remove getChild, getChild.df, getParent, getParent.df, getSibling,
    getAncestor and getAncestor.df, instead use child, parent, sibling
    and ancestor methods implemented in tidytree and treeio (2019-01-30,
    Wed)
  - remove get.offspring.df and get.offspring.tip and instead use
    tidytree::offspring (2019-01-28, Mon)
  - facet_widths function to set relative widths of facet panels
    (2019-01-28, Mon)
      - the output is ggplotify::as.ggplot(grid_object), so it is not
        the original ggtree object.

                       Changes in version 1.15.5                        

  - bug fixed of theme_tree2 (2019-01-14, Mon)
      - https://github.com/GuangchuangYu/ggtree/issues/218
  - mv rescale_tree to treeio (2019-01-11, Fri)

                       Changes in version 1.15.4                        

  - reimplement MRCA as a method inherited from tidytree (2019-01-10,
    Thu)
  - mv vignettes to treedata-book

                       Changes in version 1.15.3                        

  - move reroot method to treeio package and rename to root (2018-12-28,
    Fri)
  - bug fixed for setting branch.length="none" in unrooted layouts
    (2018-12-26, Wed)
      - bug introduced in
        https://github.com/GuangchuangYu/ggtree/pull/201

                       Changes in version 1.15.2                        

  - compatible with tibble v=2.0.0 (2018-11-29, Thu)

                       Changes in version 1.15.1                        

  - now revts also reverse the branch column (2018-11-11,
        Sun)
      - https://groups.google.com/d/msgid/bioc-ggtree/50765a34-53e5-44d2-bb8f-6d20a11fa890%40googlegroups.com
  - better msg when taxa name not consistent in sequence and tree files
    with msaplot. (2018-11-07,
        Wed)
      - https://github.com/GuangchuangYu/ggtree/issues/172#issuecomment-436585370

                       Changes in version 1.14.0                        

  - Bioconductor 3.8 release

                       Changes in version 1.13.6                        

  - set scale_y_continuous(expand = c(0, 0)) for gheatmap when colnames
    = FALSE (2018-10-17, Wed)
      - https://github.com/GuangchuangYu/ggtree/issues/204
  - made data usable with treedata in 'equal_angle' and 'daylight'
    layouts (2018-10-11, Thu)
      - https://github.com/GuangchuangYu/ggtree/pull/201

                       Changes in version 1.13.5                        

  - enable additional parameters passed to geom_rootedge (2018-09-13,
    Thu)
      - https://github.com/GuangchuangYu/ggtree/issues/195
  - facet_labeller to label panels of facet_plot output (2018-09-10,
    Mon)
      - https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!msg/bioc-ggtree/nAl3bNswxQM/crBwKtS3BAAJ

                       Changes in version 1.13.3                        

  - update viewClade according to the change of ggplot2 (2018-08-07,
    Tue)
      - https://github.com/GuangchuangYu/ggtree/issues/188

                       Changes in version 1.13.2                        

  - xmax_adjust in viewClade (2018-07-21, Sat)
      - https://github.com/GuangchuangYu/ggtree/issues/187
  - update rd of facet_plot by adding description and example
    (2018-07-19, Thu)
  - order by y in facet_plot (2018-07-09, Mon)
  - extend parameter in geom_cladelabel and geom_strip supports
    specifying extension of both sides (2018-07-06, Fri)
  - geom_nodelab2 for circular layout (2018-07-03,
        Tue)
      - https://groups.google.com/d/msgid/bioc-ggtree/cbe5e1e3-99c4-481d-8523-d5b50cf0460b%40googlegroups.com
  - re-export
        ggplot2::fortify
      - https://groups.google.com/d/msgid/bioc-ggtree/bf7a9b3c-9a8f-4d8d-a782-1b467fba38bc%40googlegroups.com

                       Changes in version 1.13.1                        

  - geom_nodepoint & geom_tippoint now compatible with ggplot2 v 2.2.1 &
    3.0.0 (2018-06-26, Tue)
  - geom_rootedge (2018-06-13, Wed)
      - https://github.com/GuangchuangYu/ggtree/issues/183
  - clade_name parameter added in collapse (2018-05-28,
        Mon)
      - https://groups.google.com/forum/?utm_medium=email&utm_source=footer#!msg/bioc-ggtree/0H1PCJPlI1Q/DeZf9EVhBQAJ
  - bug fixed of gheatmap for rowname subsetting is partial match in R
    (2018-05-23, Wed)
      - https://github.com/GuangchuangYu/ggtree/issues/182
  - compatible with ggplot2 2.2.1.9000 for geom_text2(parse="emoji")
  - typo on vignettes (2018-05-08, Tue)
      - https://github.com/GuangchuangYu/ggtree/pull/178, thanks
        @abichat
  - compatible with ggplot2 2.2.1.9000 (2018-05-02, Wed)
      - incorporate newly introduce parameter linejoin and arrow.fill in
        geom_segment

                       Changes in version 1.12.0                        

  - Bioconductor 3.7 release (2018-05-01, Tue)

                       Changes in version 1.11.6                        

  - reexport treeio::read.iqtree & treeio::read.astral(2018-04-17, Tue)
  - now geom_treescale will plot the text that can always be separated
    from the bar (2018-03-07, Wed)
  - optimize daylight layout
      - https://github.com/GuangchuangYu/ggtree/pull/165
      - https://github.com/GuangchuangYu/ggtree/pull/169
  - geom_tiplab2 works with mapping = aes(subset) defined by users
    (2018-02-24,
        Sta)
      - https://groups.google.com/d/msgid/bioc-ggtree/72e18c5b-0ce5-4c25-80fa-3e2dabda8f72%40googlegroups.com
  - fixed overlapping branch after flip
      - https://github.com/GuangchuangYu/ggtree/issues/167

                       Changes in version 1.11.5                        

  - support passing aes(subset) in geom_tippoint (2018-01-30, Tue)
  - support passing aes(subset) in geom_nodepoint (2018-01-26, Fri)
  - fine tune y position after flip; flip compatible with
        collapse
      - https://groups.google.com/d/msgid/bioc-ggtree/1d06342c-9645-4f71-9e66-7d7a7099bf0b%40googlegroups.com?utm_medium=email&utm_source=footer

                       Changes in version 1.11.4                        

  - re-implement collapse as collapse.ggtree method by importing
    dplyr::collapse generic to prevent function name collision
    (2018-01-03, Wed)
  - update treeVisualization vignette, with more layout examples added
    (2017-12-22, Fri)
  - update vignette (2017-12-21, Thu)
      - remove ggtreeUtilities.Rmd
      - merge treeAnnotation and advanceTreeAnnotation