How to change default text box font in calc

I’ve Googled this but all the solutions I’ve found do not work.

Every time I add a text box (edit - actually a shape inserted as a graphical object,) into a calc doc it defaults to Liberation Serif 12, which I would like to change.

I click inside the text box, then F11 which brings up the Styles and Formatting side bar. This lists the options of
Default
Heading
Heading1
etc etc.
Right clicking on these options brings up a second option Modify, but I can’t do anything with this. Clicking on it does nothing.
What am I doing wrong, or not doing?

Please edit your question to make clear that your questin is about a shape inserted as a graphical object from the drawing toolbar. The term ‘Text Box’ unfortunately is also used for a kind of form control.

You need to be set in design mode. Select the Text Box and right click which bring up a list. Select Control and the Properties list for the Text Box is available, where you can set the Font.

EDITED 14/03/2018

@MG312 I assumed that you had created the text box using the Forms Controls collection. My explanation applies to that. You have edited your question to show that you created the text box as a graphics object. You were nearly there in the steps you took. Having got the Styles and Formatting side bar displaying click on the spanner icon and this will open the Properties tab where you can change Fonts etc.

Thanks, Peter, but that doesn’t work. I don’t have an option for Control. When I right click with the cursor flashing in the text box the only options are Cut, Copy, Default, Text, Character, Paragraph. If I select the text box so there is no cursor flashing there are more options but none are “Control”

Any more ideas, please?

The question obviously was about any ‘Text Box’ inserted as a shape from the drawing toolbar.
Above answer applies to form controls of type ‘Text Box’. Unfortunately LibO uses the term ‘Text Box’ for two rather different object types. .

Short answer: you can’t. Long answer: there are no graphic styles on Calc nor Writer

Bug 89369 - Add support for drawing styles (shapes and textboxes) to Writer and Calc

An even longer answer: but there is a workaround. On the Drawing toolbar click the button to add a text box but BEFORE going to the document move to the Properties panel on the sidebar and select the font, font size, etc, ONLY THEN go to the document to insert the text box: the settings you’ve chosen will be maintained for the rest of the session.

…or/and manage a collection of shapes yourself in a dedicated sheet of your Calc template and use the specimens from that collection as a kind of surrogate for templates by Copy/Paste. Before saving your document as a final version you may then delete the ‘CollectionSheet’.
To do it in a similar way for a Writer document you may use a ‘CollectionFrame’.
Of course, once created ‘children’ will not inherit from the pseudo templates later-on.

Thank you for your comprehensive and helpful reply. Now I know what I can and cannot do, and the workaround is certainly better than nothing.

Thanks, Peter, but that doesn’t work. I don’t have an option for Control. When I right click with the cursor flashing in the text box the only options are Cut, Copy, Default, Text, Character, Paragraph. If I select the text box so there is no cursor flashing there are more options but none are “Control”

Any more ideas, please?

@MG312: This isn’t an answer but a comment on the first answer given. Would you object to my suggestion to delete it?

Hi Lupp
Sorry I am unclear about this. If I click on delete it deletes your comment on my post. I did originally enter a comment but it did not move my thread back up the list, so I assumed no-one would look back that far to see it. That is why I answered rather than commenting. I apologise if I acted incorrectly.

Don’t worry! And it isn’t exatly “bad behaviour” to bump a question. The poor structure of this site (breathlessly running ticker) may increase the need. If actually necessary you might, however, better bump by adding some info to your question. Edit it for the purpose.