There are two ways to share a truss: as a .truzme file, or as text.
Save your truss to a .truzme file and send it like any other file: email, chat, a shared drive. The other person
opens it with Open file… in Truzme. See Files for saving and opening.
A file keeps everything: the truss, your display settings (units, what's shown on the canvas), and background images.
The text is Project code. It holds only the truss: nodes, members, supports, loads, materials, sections and dimension lines. More on pasting: Copy, paste & duplicate.
A canvas copy only takes the materials and sections that the copied members use. To share your whole library, copy from the Project code panel instead.
Use a file when you want the other person to see exactly what you see. Use text when you only need the truss, or when it's quicker to paste than to send a file.
Text is a simple way for a teacher to hand every student the same starting truss, through whatever Learning Management System the class already uses (Canvas, Moodle, Google Classroom, …).
Teacher: build the starting truss, press Ctrl+A and Ctrl+C, and paste the text into the assignment. To include materials and sections no member uses yet, copy from the Project code panel instead.
Student: copy the text from the assignment, click the canvas in Truzme, press Ctrl+V, then Enter.
Need a background image in the assignment too, e.g. a photo of a bridge to trace? Share a .truzme file instead.