By default, Pedigree Forge allows names to be entered as Forename(s) in one field, then a surname in the next:
For users familiar with other genealogy software, you may prefer to enter names in a single field, with the convention that the surname is enclosed in forward slashes. To switch modes, select “Options” from the “Tools” menu. The option is on the “Program” tab:
Names can then be entered in the combined single field:
This preference is saved, so you only have to do it once.
More naming options can be found on the “Current Person Other Detail” dialog, accessed from the ⋮ button, next to the name: