You can access the 'Profile Settings' dialog by clicking on the last button of the 'Profile Toolbar', or using the 'Profile Menu', or pressing <Ctrl+Y>.

You'll also see the same dialog except in a wizard format if you open the 'Profile Wizard'.

The difference is that on the 'Profile Wizard' you will be able to create or select another profile to change settings and when you open the 'Profile Settings' you will be able to change only the settings for the current profile.

Here are details on each of the settings you can manipulate on a capture profile :