Using masking brush

[Itstriplek14]

The masking brush option that is available in lightroom Classic is not vsisble to me in lightroom.
Is there anything that can be done to add it.

[Theresa J]

Lightroom does have an adjustment brush, and you can turn the overlay on to see the mask. Is this what you are asking for?

[99jon]

To switch the mask overlay on and off, tab with the "O" key after you start brushing.

[Just Shoot Me]

I have moved your posy from the LrC forum to the Lr forum as your question is really about Lr.