You may also want to check the drawing location from the face, it is at the top. Basically you can have the joists start from the top down when drawing or the bottom up.
I understand a lot of people are used to drawing top down, plan views in 2d view, especially when doing joist layouts. That is no problem, simply click the structure tab. It is easy to create joist layouts in PlusSpec and add in the associated trimming beams or annotations.
I’ll make a video if it is of assistance?
Good to meet you, Michal, I briefly went through this with you in our meeting sorry, I had back-to-back meetings, so it was rushed, but if you go back through the recording you’ll see how. In Short, Use the truss joist option in the joist tool and click Create material. This is the best way to change the size and the name & size