Print settings can changed job by job basis. If you wish that your printer should be able to print on both side for the current job, then you can follow simple steps given below:
For Libre Office Writer:
- Go to Print (press Ctrl + P or click menu File> Print)
- Click Property button and on Paper tab select Duplex (Long-Edge Binding or Short-Edge-Binding) as shown below:
- Go to Page Setup tab, under Layout heading select Two Sided property as "Long Edge (Standard)"