Set default font size for all text and Text color

[Alex - WarumLinuxBesserIst -]

It should be possible, to set the default font size for all used text on Ubuntu Touch.

Like in Android it's possible to choose the standard text size: small, normal, large, super large
Because if you don't have 100% vision, sometimes it's very hard to read text.
A good place would be: System Settings > Default textsize

Also there should be an option, to adjust the color. Because in many places on the phone E4.5 and tablet M10, the background is light grey and the text is grey. So it's very hard to read the text, especially if it is small text.
I am experience that all the time on my bq E4.5, that I almost can not read the text.

I just installed on my bq Aquaris M10 FHD Ubuntu Edition, the Android 5.1 Firmware and after setting the standard text size to "large" I can easily read all the text. But after reinstalling Ubuntu Touch, the text was so small again.

The only place where you can zoom in is the browser, but not anywhere else.

Also it's very hard to read the text for send SMS. Green background with very small grey text.
Especially the text bottom right, that's VERY small and for me unreadable. I guess you need eagle eyes to read that.

Would be very nice if there is something to adjust the standard text size to enlarge or shrink it globally.