Why slides use fragments instead of full sentences
An audience reads a slide in the few seconds before the presenter moves on, so slide text is optimized for speed of scanning rather than for grammatical completeness. That is the whole reason fragment style, consistent formatting, and parallel structure matter so much more in a deck than in an email or a report.
A quick pass with fresh eyes catches most inconsistencies
Wording inconsistencies are hard to spot while actively writing a deck, since the writer already knows what each bullet means. Stepping away for a few minutes and then reading through the whole deck once, slide by slide, purely to check number formatting and bullet structure, catches the vast majority of these small mismatches.
Frequently Asked Questions
Is it ever appropriate to use full sentences on a slide?
Yes, a quote, a key definition, or a single strong statement can work well as a full sentence for emphasis. The rule of thumb is to keep that use rare and deliberate rather than mixing it in randomly with fragment-style bullets.
How many bullets should go on a single slide?
There is no fixed number, but most presentation guidance suggests keeping it to around three to five per slide. Once a slide needs more than that to make its point, it usually works better split across two slides.