If that is Text you have to use the command Modify > Edit > Text select which ones you would like to edit and in the next dialog change the font size at the top right.
If you're editing several Text entities just by font size you can use this API.
The HTML Clipboard
Sub Main Dim App As femap.model Set App = feFemap() Dim txt As femap.text Set txt = App.feText Dim tSet As femap.Set Set tSet = App.feSet tSet.Select(FT_TEXT, True, "Select Text to Change Font Size") While tSet.Next() tID = tSet.CurrentID txt.Get(tID) 'Change Font ID below txt.FontNumber = 6 txt.Put(tID) Wend App.feViewRegenerate(0) End Sub
Change txt.FontNumber = according to this list
You are most likely using the "Performance Graphics" setting in preferences. In that mode, the labels are not controlled by the setting you are using. If you notice, in the dialog box you are showing, there is a button labelled "Performance Graphics Font". Press that, and set the size you want in that dialog. It is independent from the labelling for the legends and axes.