How to widen this object

I made a simple box with a sliding lid. The lid is too loose. I would like to widen it by 0.2mm. I’m using the Mac desktop app not the iPad app.

When I click on the side I want to widen (in the picture below, area shaded in blue), I only get the option to widen in a different direction. When I click on another side, I get the option to widen the top of the area I want to widen but not the entire section. (I was not allowed to share two pics). I have clicked around the whole object but cannot bring up an option to widen the whole side desired.

I am very new to all of this, please be kind.

Quick and dirty you can try extruding the face by that much. Select the face and then the extrusion tool. Choose new body (top bubble) and then add it later. Safe bet.

Is this what you are trying to do?

Wrong side I think.

Yes! Thank you. I kept seeing people say use the move tool but it just didn’t click to move it the way you did in the video. Thanks so much.