Threaded Holes

Although I am a veteran CAD user, I have no access to paid CAD (ex. Solidworks), so I'm new to Onshape CAD and 3d printing. I'm disabled and trying to design and 3d print a adjustable straw for my wheelchair. I've gathered my design knowledge, which will use… 1/4PT Flexible Oil Coolant Pipe Hose Silicone Tubing Now, I can…

How do you display thread lines in a part studio? I'd like dotted lines to identify this as a tapped hole, and it would be a better representation of the hole. Thanks!

Is it possible to create a hole feature that names the feature the same as the tap information or clearance information? For example if a hole feature creates a tapped hole for a M3x0.5 screw, the feature would be called M3x0.5, and if the hole feature creates a clearance hole for the M3x0.5 screw, the feature would be…