"StyleOther" is a front end token that opens the Custom Style dialog.

Cell Tags From In/Out Names gives the selected cell a tag that is the same as its current input or output prompt.

Font opens a dialog to view and edit font, font style, size, and other text options.

Initialization Cell makes a cell auto-evaluate whenever the notebook is opened and the kernel is launched.

InputForm converts the selection to Mathematica InputForm.

Insert New Cell creates a new cell with the selected style at the cell insertion point.

Show Page Breaks calculates and displays page breaks on screen.

Text Justification controls justification of cells with word wrapping.

CellEpilog is an option for Cell which gives an expression to evaluate after each ordinary evaluation of the contents of the cell.

CellGroupingRules is an option for cells that specifies the rules used for grouping a cell.