"StyleOther" is a front end token that opens the Custom Style dialog.
"TemplateSelection" is a front end token that inserts a function template to the right of the insertion point.
BoxData
(Built-in Mathematica Symbol) BoxData[boxes] is a low-level representation of the contents of a typesetting cell.
ChartElements is an option to charting functions such as BarChart that specifies the graphics to use as the basis for bars or other chart elements.
ChartStyle is an option for charting functions that specifies styles in which chart elements should be drawn.
DefaultElement is an option for Grid and related constructs which specifies what to insert when a new element is interactively created.
FileNameDialogSettings -> {opt -> val} is a global option that specifies settings for the Insert File Path dialog box.
FindGeoLocation[] attempts to find the current geodetic location of your computer.
GrayLevel[level] is a graphics directive that specifies the gray-level intensity with which objects that follow should be displayed. GrayLevel[g, a] specifies opacity a.
Modal
(Built-in Mathematica Symbol) Modal is an option to functions such as CreateDialog that specifies whether the dialog that is created should be modal to the Mathematica front end.