How to choose which tools appear on your marking menus.
.
-drag tools onto a shelf
in the window to add them to the corresponding marking menus.
and double-click icons to
shorten (or abbreviate) the name of the function. This allows for
narrower marking menus.
The order of the tools on the marking menu shelf controls what position they occupy on the marking menu:

Remove a tool from a marking menu
.
-drag the tool to the trashcan
icon.
Rename a tool on a marking menu
.
and double-click the tool
icon.
Swap marking menus between mouse buttons
.