As to a Fillable PDF form, I'd recommend using a proper PDF program, like Adobe Creator. LibreOffice is a fork from the original OpenOffice, so they share a lot of the same code. Related posts: Default paper size in Open Office, Firefox change default page format, Locale configuration on Ubuntu. LibreOffice has a higher compatibility with MOffice formats than OpenOffice does and LibreOffice also has a higher level of active development. Right-click the template that you created, and choose Set as Default Template.In the Templates list, double-click the 'My Templates' folder.In the Categories list, select 'My Templates', and then click OK.In the New Template box, type a name for the new template.Create a document and the content and formatting styles that you want.When I was asked for the 'normal.dot' I searched a lot and I searched the internet to finally find out, that it is described very well in the Open Office help:

However, most people are just used to just firing up MS Word or if they are on Windows with Open Office they miss the nice template folder and to create a new document from a template within Open Office for me is definitely too many clicks away (3 clicks and 2 double-clicks). That way I neither have to think about what type of document (text, graphic, spreadsheet) my template needs to be. The first action I take when I want to create a new document is to go in the folder where I want to save it, click the right mouse-button, hover on 'Create new document' and choose the template of my choice. I have copied all my templates to ~/Templates. Some time ago I was asked where the normal.dot is in Open Office and I was stuck.

Openoffice or libreoffice 2014