How to set your favourite font as system wide in any custom rom

For example I want to make rosemary font as system wide they can be any font as u wish, 

So first u need to search for font .ttf,  you can get this .ttf form different source like from simple google search or other roms or other phone or simply a font magisk module , for this time we are going with magisk module, so simply extract that module zip you will find system or font folder in it, in that you will find .ttf of your favourite fonts like rosemary.ttf they will be 7-8 or more .tff like rosemary.ttf rosemary- bold.ttf now what is it so rosemary is font name and bold means font is bold like that you will find 7-8 fonts type .ttf files,

So After getting .ttf files now rename them, replace the rosemary with roboto like roboto.ttf, roboto-bold.ttf etc after doing this 

Reboot to recovery and go to system- fonts- and copy paste all the .ttf files you have created after pasting reboot to system and done ✅ you have successfully set your favourite font as system wide