The following screen shots show the initial results from completing the example in the topic Infix Example.
Here is a screen shot of the lexical entry (Lexicon) for the actor focus infix –um- (the object focus infix –in- would be similar):
Here is a screen shot of the interlinearized words (Interlinear Texts), starting with the stem (sulat), and then the stem with the infixes (sumulat and sinulat):
TipTo separate an infix from a stem in the Morphemes line, you need to select and cut (Ctrl+X) the infix, and then paste (Ctrl+V) it in front of the stem. Then, manually edit the infix and stem as needed to add the tokens and ensure correct spellings
For more information, point to Resources on the Help menu, and then click Introduction to Parsing. Infixation is discussed under Morphophonemics.