I had a PM asking how to use FontForge to change font Panose Weight. As the MR PM system doesn't allow image attachments, I'll post details here for anyone else who might be interested.
- First take a copy of all 4 original ttf files. It's quite easy in FontForge to overwrite the original if you get a bit click-happy
- Open FontForge, navigate to xxx-Regular.ttf and double-click it. This will open a new window displaying the glyphs.
- From the menu goto Element > Font Info.
- From the left-hand column highlight OS/2 and click the tab labelled Panose. You should see something like the first attached image.
- You will see a column of metrics, each with a drop-down menu. Weight is the 3rd item. If its value is anything other than Book, click the drop-down and select Book.
- Click the OK button at the bottom. You will be back to the main window showing the glyphs.
- To save your updated ttf, click File > Generate Fonts, see second attached image. Navigate to wherever you want to save it and click the Generate button at the bottom. (You may get some kind of pop-up warning. I just ignored it by clicking Yes.)
- Click File > Close. You will a get a pop-up asking whether you want to save an untitled.sfd file, click Don't Save.
- That's it for the xxx-Regular font.
- Repeat steps 2-8 for xxx-Italic.ttf.
- Repeat steps 2-8 for xxx-Bold.ttf and xxx-BoldItalic.ttf. However, in step 5 select the Weight value Bold from the drop-down menu.