There is a toggle in the Edit Menu to choose between Edit Styles and Edit Text. Choose Edit Text.
NimPro is not efficient as a text editor, but it can be used to clean up some issues directly in the text.
If you need to do the same operation over and over again, try to find another way of making those changes. Or you can leave a marker which will remind you of the changes to be done in Microsoft Word, Duxbury DBT, or MegaDots.
MegaDots or Word may be much more efficient to make large scale changes to your text.
You can right click on images to decide how to handle them.