why isnaet my photoshop brush working?

One possibility is that you accidentally deleted the file that stores the pen’s color information. To restore the pen’s original color, you’ll need to restore its original file from a backup or from the pen’s original hardware.

The reason your brush colors are appearing as grey on Photoshop is because the default color space for images on a computer is RGB. When you create a new document in Photoshop and choose “RGB” as the color space, all of your images will be stored as RGB values. However, many digital painting applications use a different color space called CMYK. When you save an image in CMYK format, Photoshop will convert the RGB values to CMYK values before saving the file.

There are a few reasons why your brush might appear gray in Photoshop. One possibility is that you have set the brush color to black or white, but the actual color of the brush is something else. In some cases, the actual color of a brush can be different depending on the lighting condition. If you frequently work in dark or light environments, it might be helpful to set your brush color to “custom” so that it will always match your current environment.

There are a few different ways to reset Photoshop on a Macbook Pro. The easiest way is to hold down the Option (⌘) and R keys at the same time while clicking the Photoshop application icon in the Dock. This will open the “Reset Photoshop” dialog box, where you can click the “Restore Defaults” button to reset all of Photoshop’s settings to their default values.

There are a few ways to find missing tools in Photoshop. One way is to use the keyboard shortcut “Command + Option + T.” This will open the Tools panel and show all of the tools that are currently available. Another way is to use the “Window” menu and select “Tools”>”Missing Tools.” This will show all of the missing tools that are currently unavailable.

The settings in Photoshop 2021 are found in the File > Settings menu.

To restart Photoshop 2021, press the “Windows” key + “R” key at the same time.

There are a few potential causes for this problem.  One possibility is that the brush is not loaded with the correct colors. In Photoshop, brushes are stored as vector objects, so they can be edited in any color you like. If the brush isn’t loaded with the correct colors, Photoshop will default to using the colors of the foreground or background layer, which may be white in your case.  
Another possibility is that you may not have set up your brush correctly.

To reset your Tools in Photoshop 2020:
Open Photoshop 2020.
In the menu bar, click File > New > Document.
In the New Document dialog box, make sure the Use Default Settings check box is selected.
Click OK.
In the Tools panel, select the Brush tool (B).
In the Options bar, select the Size option and enter 100 in the Width field and 10 in the Height field.

There is no “brush settings” in Photoshop.

In Photoshop, go to “File” and select “Preferences.” In the Preferences window, click on the “Brushes” tab. Under the “Default Brush” heading, select the desired brush from the drop-down list.

In Photoshop, go to “File” and select “Preferences.” Under the “General” tab, click on the “Brushes” button. In the “Brushes” dialog box, you can reset your brush settings to their defaults by clicking on the “Reset All” button.

The Healing brush tool is used to blend colors and heal areas of an image. The Spot Healing brush tool is used to fill in areas with a specific color.

To reset the Magic Wand tool in Photoshop, hold down the Alt (Option) key and click the Magic Wand tool.

Ctrl + J is the shortcut for “J” key in Photoshop.