To have foundations staggered by one level, for example the presence of foundation elements at the lowest level (e.g. level 0) and others at the level just above (e.g. level 1), in the Data|Uprights table, simply assign the value 1 to the "lf" data item (Foundation level of the column) for one of the upright lines leading to the span of the possible foundation beam to be inserted at level 1.
As shown in the figure in the case of riser line 44 of span 38.







The frame view of which is shown in the following figure.



For staggered foundation beams present at level 2, assign 2 to the "lf" data.