Options for Font Size Control

Hello!
I downloaded the WebApp and while I appreciate the work you have done, I found one problem with the App which I feel an urgent need to keep working on the app... you have not given us any control for the font size. With the default font size, I find the layout very strainful and unappealing to work on.

I do see that you have already used varying size of fonts, so you may add small, medium and large options, as I take the liberty to name the current set of font sizes as tiny.

So at appropriate place, please allow us to change the default "tiny" font size to "small" or to "medium" or to "large". If you cannot give 4 size sets for fonts, consider giving 3 or atleast 2, the second size set being larger compared to the current font size set.

Request you to kindly make a provision so that users can change the font size to their comfort or liking level - I need slightly bigger font to feel comfortable - hope you will do the needful.