I know you can use the "x" on the keyboard to switch to the little selection arrow, rather than going to the tools palette, which is useful.
However I quite often am using, say, the trim tool (ie. the one with the scissors symbol that chops a bit of line out between two other lines it crosses), and am constantly switching back and forth from that to the selection arrow. (Trim a line, select a line and move it, trim something else, select a line and resize it, trim another line, etc.)
In this situation it would be really useful to toggle between the two tools with a keyboard shortcut. Basically what I want is a keyboard shortcut that will take you back to the tool you last used before using the selection arrow, whether that's the trim tool or something else.
Is there a way of doing this?