Save us the tedium of selecting all accounts one at a time to see a complete financial projection.
@ChattMatt, thanks for posting your suggestion to the community!
I moved this out of Feature Requests for now so we can gain a clearer understanding of what specifically you're looking for in Quicken Simplifi. Are you referring to the Bills & Income > Cash Flow section? If so, it looks like this little box at the top allows you to select and deselect all accounts with a single click:
Please let us know if this works for you! If not, please let us know whether you're using the Quicken Simplifi web or mobile app, and which specific area of the program you're referring to, so we can better understand your request.