Most text boxes and other text-oriented display things have a property called .FontSize that can make text look bigger or smaller on screen.
Office VBA reference topic
learn.microsoft.com
Warning: The font size property uses
points, which is a publisher's unit,
not a display unit derived directly from resolution settings.
By that publisher's standard, 1 inch = 72 points. It is theoretically possible for Access to address something in
twips (a modern typographical length unit), where 1 inch = 1440 twips. If you do the math, a twip is 1/20th of a point. That twip is the smallest display unit you can specify.
en.wikipedia.org
Twips and points are used because Microsoft cannot rely on a particular screen resolution from one user to the next. So when something is given over to the display rendering code, it knows the current screen resolution settings and it knows the typographical size. It computes where each pixel goes and how it looks. It is not well appreciated any more, but when you use a True-Type font or anything more modern than that, you are looking at something that computes the shape of the letter based on input font size, vectors, and space-fill options. It has been decades since a non-True Type font was commonly used. The versatility of such fonts comes about because they are drawn as vectors to build lines or shapes that get filled in during rendering.