[Are there any ways to show outside of canvas in Affinity Photo?]

I need it to put references while drawing

It works very well on Affinity Designer but I wonder why It can't be the same

[Are there any ways to show outside of canvas in Affinity Photo?]

I know it's possible on Affinity Designer (View -> View Mode -> Clip to Canvas)
How can I do it on Affinity Photo?

[Is it possible to hide all layers at a time?]

I know I can use Alt + left click but it's temporary
Is there any way to actually hide all?

[How can I change node types without changing its shape?]

Thank you! That worked well.

[How can I change node types without changing its shape?]

I know I can change a smooth node into a sharp node but it also changes its shape

How can I change a smooth node into a sharp node while keeping its angle?