How to make an image white and background transparent?

Question

Adobe Photoshop

Dear members of the forum, could you tell me how Marketing partners can make the letter f and the background transparent, and change the blue to white? Image only in .png format

Answer 1

I attached a picture, it's not visible here. it is white), but if you download, then as it should ...
This is done through the levels (Channels)

Answer 2

Create a document of the same size, take an icon from the web, write text and leave the background transparent. Well, or look for the same picture on a transparent background already ready (and suddenly there is one). The answers are obvious, in general.

Answer 3

Thank you! I found the following solution: a high-quality image on the Internet, with the help of a magic eraser I made a transparent background where necessary and then replaced the color with white (image - correction - replace color)