can you ask this at Lenovo community?
or learn what version of Android OS you have now.
then go to any android forum on earth or read manuals on it.
but here is where to ask first.
what version of android you run,
the answer will be the Chrome browser rules I bet.
website + chrome browser = larger font.
Android "Nougat" (codenamed N in-development) is the major 7.0 release of the Android operating system. It was first released as a developer preview on March 9, 2016
also what Chrome browser version you run now, can have bearing on hot keys possible in the app.
Chrome browser V72 is NOW.
there are 2 ways, ZOOM or Font size.
I'm guessing font size is your question;
https://forums.lenovo.com/t5/forums/searchpage/tab/message?filter=location&q=tab%204%20,%20users%20manual%20android&location=category:Community-EN&collapse_discussion=true
next I will google for you, are you ready, 1,2,3 go google
lands this.,
If you want to change the font size for most of the websites you visit, you can change the settings of your Google Chrome browser to accommodate. Simply open your browser, click on the three vertical dots on the top right corner and click on "Settings." Scroll down to the bottom and click on "Show Advanced Settings." Under "Web Content," you can customize the set font size, page zoom and font. Note that though most of the websites you visit will appear in your set font size, page zoom and font settings, Google
Chrome might not be able to adjust all websites.
and the best of all ?
this (step by step , spoon fed ,examples)
https://www.wikihow.com/Change-the-Default-Zoom-for-the-Android-Browser