Another way to edit is to click F2. Once you're in a field that doesn't seem to allow editing (such as the awful new conditional formatting fields in XL 2007), when you try to click on the dollar sign for example, or try to move within the field you want
to edit, the field picks up more characters instead.
Once you're in the field itself, click F2 - then you should be able to move around the field with your arrow and edit. Good luck though! I removed the $ signs from my conditional format and then copied right and good old XL 2007 kept the original column
anyway.
This F2 command seems to work in just about any field that you need to edit.