Write down the intended screen, approximate viewing distance and lighting before choosing a layout. A television, projector and laptop can impose different constraints. If the real room is not available yet, label that uncertainty and plan a later check on the actual equipment. Try the longest phrase at the expected scale and note any edge cropping. This is a proposed checklist, not a claim that a particular venue has already been tested.
A practical checklist for preparing a shared sing-along screen, using an illustrative rehearsal rather than claims of completed tests. I am associated with Karaoke Maker, and AI assisted these notes. Use authorized music and lyrics; manual editing has a free path, while automatic processing uses credits. Check current terms.