Answer:
During the calculation, the convergence diagram is displayed in the solver window of RFEM 6 and RSTAB 9 (see Image 01).
To insert and edit such calculation diagrams, a new main group has been introduced. You can find it under the "Loads" group in the Data navigator. You can also open the calculation diagrams in result tables, if you have defined them (see Image 02).
If you calculate a load case or a combination in several load increments, activate the "Save results of all load increments" option in the Static Analysis Settings (see Image 03). Otherwise, only the results of the highest increment will be displayed in the calculation diagram.
The "Edit Calculation Diagram" dialog box is shown in Image 04.