Yes centering is not a standard menu item and easy to use feature on the new Connect and for this reason I’m thinking, if I can make it happen, to in fact get Local Guides to enter their screenshot details on the T100 System and let it do all the fancy formatting work hehehe. However, given the current situation, for now at least we can relax the requirement to center the screenshots @tony_b but if you’re keen on having a go, read this How to center Images and Text on the new Connect post that I’ve just added based on your prompting.
HTH