Unable to remove fonts from a PDF file

[rmhall1]

I have a PDF file whose size is much bigger than I would expect.

Using Acrobat Pro option 'Save As Other->Optimized PDF' and then Audit Space Usage I can see that the problem is that there are embedded fonts

However when I go to the Fonts page it shows no embedded fonts

Is there anyway to reduce this file size?

I have no need for any embedded fonts.  If I am using one 'by mistake' I am happy to change the font to one that does not need to be embedded if someone can tell me how to do that.

The fonts listed for the document are

[Test Screen Name]

Not all fonts are removable. Is this a fill-in form?

[rmhall1]

Yes, it is a fillable form.

But I have other versions of the form that are very similar which do not have this problem.

If I knew the field or font that was giving the problem I would happily change to a different font.

[Bernd Alheit]

What fonts does you use in the form text fields?

[rmhall1]

The font in the fillable fields is Helvetica

The font in the 'non-fillable' fields is Arial.

These are the same fonts that I use in the similar forms that have a much smaller file size.

If I need to change the font, is there a way to do all fields at once, or do I need to it field by field

[Bernd Alheit · Accepted solution]

You can select several fields and change the properties.

You can remove unused fonts:

Open a empty document with one page.

Insert your Form.

Delete the empty page.

[rmhall1]

That works thanks.

After creating the empty PDF, I used 'Combine Files' to add in my form and saved.  The size is now arouing 100kb.

[CAFN IT]

Thank you, that worked for me as well and saved me a lot of time recreating the whle thing,

[andrewo31439192]

Same situation outlined in screen shots above
same question as above but not related to a form.

Origin of PDF is a google slide export. 
Would a change in font usaage in source negate the need for embedded fonts?