Click the Project tab.
Open both the Context-Sensitive and Text-Only Topic Files folders.
Double-click the text-only topic file (.TXT) that you want to modify.
From the Topic ID list, select the topic to edit. Its content is displayed in the Topic Text box.
In Topic Text, edit the text.
Click Add/Update. The topic text is updated.
Compile your project to update the .CHM file.
Tip: You can change map numbers at this dialog. Edit the number in the Map # field just like you edit text in the Topic Text box.