Attached the test project and the screenshot. The code is just this:
Dim ListTemplate As B4XListTemplate
Dim dlg As B4XDialog
dlg.Initialize(MainForm.RootPane)
dlg.Title = "Title - this is default font 12"
dlg.TitleBarFont = xui.createDefaultFont(12)...
In B4A, I use customlistview1.DesignerLabel.TextSize to change the textsize, but in B4i the textsize property is missing.
Please whats the B4i way of setting custom listview text size