[Looking for a list of quick tips on how to do many popular Photoshop tasks ... in Affinity Photo?]

I'm looking for a list of quick tips on how to do many popular Photoshop tasks ... in Affinity Photo?

For example, things I often did in Photoshop include:

• Trim empty pixels around an image
• Remove a single specific color (not just white) from an image (or change a specific color to another)
• and many other tasks

Is there a document that lists many of the common and popular Photoshop tasks, and how to do these in Affinity Photo? 

Like a quick tips sheet?

Gary

[How to remove a single color from image & make it transparent]

On 1/1/2019 at 11:18 PM, mattius.m said:

don't worry, i figured it out. I went to filters, then colours, then erase white paper.

i hope this helps someone

This is great.

But what if the color we want to remove isn't white? Is there a simple way to select a color from an image and just remove a specific color (other than white)?

- Gary Gordon