This works for vertical or horizontal lines. It is especially useful if you need to go back in and edit lines at a later time. Draw the lines a bit longer than you need. Select a small section of the straight part of the line using the rectangular select tool and delete it. Then select the rest of the line starting from the blank area and include the entire ...
No. Not directly.
Draw a rectangle filled with any color other than blue, to cover that bottom portion
Move this new rectangle behind the blue
Select both shapes
Hit the Merge button on the Pathfinder Panel
You'll end up with 2 shapes.
I have the same problem but I solved it finally after two days. You can go to Edit>Preferences>General>Performance then check the box of Real-Time Drawing and Editing, you can uncheck also uncheck the box if you want to see the “skeleton” again.
I'm not a Sketch user, so I can't say for sure how easy this would be in Sketch. But if I was doing this in Illustrator or Inkscape, I'd draw a circle, stroke it, add some anchors/nodes, and delete a segment to make a C shape, or in Inkscape just adjust the arc start and end points. Then draw two straight lines. Then I'd adjust the stroke width as required.
Check you Photoshop Performance setting: Path Options only work with Use Graphics Processor option turned on.
If the option is disabled, turn it on and restart PS;
If the option is greyed out your GPU isn't supported by Photoshop and I guess the only thing you can do is to get a more modern PC;