System Information
Operating system: macOS-10.15.7-x86_64-i386-64bit 64 Bits
Blender Version
Broken: version: 3.5.0 Alpha, branch: master, commit date: 2022-12-02 21:53, hash: rB9719fd696488
Short description of error
In this online documentation page:
https://docs.blender.org/manual/en/dev/sculpt_paint/texture_paint/tools.html
There mentioning of:
Fill It can be used to fill large areas of the image with the brush color. The tool fills adjacent pixels that have a color value similar to the pixel you clicked on. Fill Threshold (2D only) Determines how much the color must be similar to the color of pixel you click to be filled. A low Threshold only fills very similar in color pixels. A higher Threshold fills pixels within a broader range of color.
Setup the monkey example to using Fill / Color but unable to locate such field 'Fill Threshold', as image below:

