I have defined ten load cases. Now I want to add two more load cases right after the third load case. Is this possible?
Yes, it is possible. To do this, select on the menu "Tools" -> "Renumber" -> "Shift." You can adjust the numbering of the load cases in the "Load Cases and Combinations" section (see figure). Here, you can specify the numbers of the load cases that you want to shift in order to create a gap. Use the "Increment" column to specify the size of the gap. Now you can create a new load case and specify the corresponding numbers for them.
Structural engineering software for finite element analysis (FEA) of planar and spatial structural systems consisting of plates, walls, shells, members (beams), solids and contact elements
The structural engineering software for design of frame, beam and truss structures, performing linear and nonlinear calculations of internal forces, deformations, and support reactions