When you open libreoffice impress you will get a dialog to select a template with a preview select which one you want to use by left clicking and then click :guilabel:`open`. To add a title to a slide click where it says click to add title.
..image:: impress-theme-select.png
To open a previous presentation you have been working on press the button that looks like a folder with a piece of paper in it and navigate to the file you want and open it or :menuselection:`File --> Open`. To view your recently opened files press :menuselection:`File --> Recent Documents`. To save your presentation press the button that looks like a floppy disk or :menuselection:`File --> Save`. To save a new copy under a custom file name :menuselection:`File --> Save As`. To save a file as a pdf :menuselection:`File --> Export as PDF`.
To type text into a presentation click in one of the boxes for your theme and type in the text with controls for the text on the right hand side. To insert a picture press the button with what looks like a photograph of a tree and select the file you want to insert or :menuselection:`Insert --> Image...`. To insert audio or video to your presentation :menuselection:`Insert --> Audio or video`.
