How to stop a mask from affecting a particular layer

[steeleaffinity]

Hey guys, question as above. Example below:

 

I want to draw a white rectangle under the dark area so that instead of the manilla showing white does instead. How would I go about doing that in affinity designer?

 

Thanks,

 

Steele

[Alfred]

Welcome to the Serif Affinity Forums, Steele.

Without being able to see the Layers panel it’s impossible to know the structure of the document, but you can restrict the effect of a mask by nesting it in, or grouping it with, the target layer. If you can supply more details, or attach a Designer document or a better screenshot, it should be possible to advise you further.

[loukash]

57 minutes ago, Alfred said:

you can restrict the effect of a mask by nesting it in, or grouping it with, the target layer

1 hour ago, steeleaffinity said:

How would I go about doing that in affinity designer?

It's for Affinity Photo, but this tutorial nicely demonstrates the general Affinity concept of masking and clipping layers:
affinity.serif.com/en-gb/tutorials/photo/desktop/video/318402519