Constrain brush stroke by holding finger

[chechoribero]

I don't have a keyboard and the modifier key button to constrain a brush stroke to the vertical or horizontal axis is too hidden and it's a bit cumbersome to display it every time I need to draw a straight line. It would be so much easier if I could just constrain the brush by just holding one or two fingers down while I draw.

[Julia04]

I dreaming about this! 

[Lemonsprig]

+1 for this

This is a common feature in a lot of other apps and something that I find myself really missing in affinity. I know you can use the pen tool to draw straight lines but when you are doing brush work you sometimes want to just do a quick straight line using the same brush, same thickness etc. which can be difficult to get right if you have to switch to the pen. It really slows the workflow down.