[AD inverting mask layer ?]

Is there any way to invert a mask layer in Affinity Designer on iPad?

I have seen several topic regarding how it gets done in Affinity Photo (using channel mode, which I can’t find its counterpart in Designer) 

but I want to do this in Affinity Designer and am still pretty puzzled. 

 

Also I’m having a hard time inverting a selection, too. 

I do it by tracing and then set it to outer line mode and widening pixels.. and I couldn’t help but thinking there may be more simple way as in Photoshop etc..

 

 

 

 

[How to fix a brush stroke application in pen tool mode?]

I want to keep draw the same setting of brush stroke in pen tool mode 

but when I deselect, and start a new line, it just goes back to normal line even though

 

 

brush stroke mode is already selected, and in brush menu the brush I used before is marked selected. 

and I have to adjust everything, re-tap the brush that is already marked as selected, 

 

 

 

then it goes with the default width so I have to change everything, 

every time...

 

I have looked up tutorials, and skimmed through the Affinity official workbook 

but couldn't find a solution to this.