The usual way to define the options like the toolbar options for the flipbook and mobile platform, page offset, and default cover thumbnail image is at the Title/Folder level.

There may be some cases where you need different settings on a particular issue, compared with the normal settings selected at the title level that apply to all Issues under it. (examples: a page offsest may be different on a particular issue OR a fold out cover advertisement may warrant the always open option for a specific Issue)

You can specifically set some options at the Issue level that will override the Title/Folder settings.

Access Override Settings

Step 1:  Navigate to the Folder/Issues screen (Title/Issues) and Click on a thumbnail of your Issue to access it's options

Step 2:  Within the Issue Options screen, navigate to the Manage Tab, and click on the overrides button

Step 3:  In that popup, just select the options you want to apply to that particular Issue only and hit the save button.