Define Brush Preset Not Working

[hcbphoto]

Hello:

I'm using Photoshop 2021 and Windows 10.

I'm trying to create a custom brush.  When I go to Edit, the Define Brush Preset is greyed out.  How do I fix this?

Here is what I did.  Maybe I missed a step.

1. Created a new document (File > New)

2. Size: 2500px x 2500px (I believe that Photoshop 6 and below is 2500x2500 and Photoshop CC and above is 5000x5000). 

3. 72 resolution, RGB, 8 Bit, White Background

4. Create

5. Created a new layer

6. I drew a triangle.

7. At this point, I believe the triangle for the brush should be black on a white or transparent background.

8.  I have the triangle selected.  Now, I'm ready to define my brush.

9. I go to Edit and I should be able to select Define Brush Preset, however, it is greyed out.  I'm not able.

I'm not sure what I'm doing wrong.  Can someone help me?  I have graphics provided to me as .PNG's which I want to create brushes, but if I can't create a simple brush like above, I don't see how it would work with other files.

I attached two screenshots.  One when creating the new document.  Two, the Edit menu.  You can also see that the Define Custom Shape option is also greyed out.

I hope someone can help me find a solution.

Thank you!

[hcbphoto · Accepted solution]

Hi Jeff,

You are right. Somehow I had duplicates of each brush reaching the limit.  I recently had a new drive installed and the tech, after cloning, duplicated some stuff. 
I deleted all the duplicates, redrew my triangle, and my setting is no longer greyed out.  I'm good to go.  For reference, what is the limit on brushes?

Thank you so much for your help.

[jane-e]

Hi @hcbphoto 

This is working for me in all of these instances:

• Draw triangle and do not rasterize (layer selected)
  • triangle not selected
  • triangle selected with Path Selection tool
• Rasterize (layer selected)
  • no selection marquee
  • select with rectangle marquee
  • Cmd+A to select all
  • Cmd+click thumbnail in Layers to select pixels on layer

Can you go to Help > System Info, then Copy, and finally paste into a Reply window? Maybe we'll spot something there.

~ Jane

[Dzalanyama · Accepted solution]

I had the same problem. It seems the brush shape must not exceed 2500 pixels in either direction. This sorted it for me.

[khsana04]

Thank you Dzalanyama, your answer solved my problem