**Introduction**

This page is intended to collect in one place various bits of knowledge gained through much trial, many errors, and some reading the [C] code of the [Tile] widget set.  The intent is to not have to repeat the trial, error, or reading in order to remember how to utilize the [ttk::style] command to style various [Ttk] [widget]s.  This initial version is quite incomplete, as it only documents those bits I've deduced so far.  This is for Tk 8.5.8.

**[ttk::treeview%|%treeview%|%]**

   -fieldbackground:   Configures the background color of the unused portion of a treeview widget (any area not covered by rows of data).
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ttk::style configure Treeview -fieldbackground color
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   -background:   Configures the background color of rows that contain data values when applied to a .Row style sub-selector.
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ttk::style configure Treeview.Row -background color
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   -foreground:   Configures  the  foreground color used to draw items in the tree column (#0) when applied to an .Item style sub-selector.<<br>><<br>>Configures the foreground color used to draw non-tree (-values list) columns when applied to a .Cell style sub-selector.
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ttk::style configure Treeview.Item -foreground color
ttk::style configure Treeview.Cell -foreground color
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   -rowheight:   Adjusts the rowheight (spacing between rows) in the treeview, distance is in pixels.
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ttk::style configure Treeview -rowheight height
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   -indent:   Adjusts the indentation amount of child elements below parent elements within the tree column.
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ttk::style configure Treeview -indent distance
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Adjustment  of  the  background color of selected items in the treeview uses the ttk::style map sub-command applied to the style sub-selectors above:
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ttk::style map Treeview.Row  -background [ list selected color ]
ttk::style map Treeview.Cell -background [ list selected color ]
ttk::style map Treeview.Item -background [ list selected color ]
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Adjustment of the background color of the the column heading labels uses  the ttk::style map sub-commend applied to the .Heading style sub-selector:
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ttk::style map Treeview.Heading -background [ list active color !active color ]
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**[ttk::checkbutton%|%checkbutton%|%]**

   -wraplength:   Configures wordwrapping of the textual label of the checkbutton.  Distance is in pixels.
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ttk::style configure TCheckbutton -wraplength distance
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**[ttk::panedwindow%|%panedwindow%|%]**

   -sashthickness:   Configures the thickness of the sash between the panes of the paned window. Thickness is in pixels. Note that the vertical sash is used for the '-orient horizontal' layout of the panedwindow and vice versa. Also note that the sash seems not accessible anymore if the thickness is set to 1 (this is with Tk 8.6b3 on a Mac). It would also be great, if the color of the sash could be altered, but see also the section on "Create a custom sash handle bar" on this page: [ttk::panedwindow].
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ttk::style configure Vertical.Sash -sashthickness 2
ttk::style configure Horizontal.Sash -sashthickness 2
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