PA-ETEP allows you to create multiple Walkthroughs. Below is list of your options...
1) Running Record Walkthrough - You can create a Walkthrough and
keep coming back to it, either adding more comments or editing
previously created comments. (See screen grab)
2) New Walkthrough - You can create as many brand new and
separate Walkthroughs by clicking the Create New button. (See screen
3) Follow-Up Wallkthrough - You can create a new/separate
Walkthrough that retains the comments of a previous Walkthrough by
clicking on the Follow-Up button. (See screen grab)
FYI - These options also apply to Anecdotal Notes.