When you select any material in the preview window, you will see some options if you click right button of the mouse. Now let's briefly explain these options:
CREATE NEW CATEGORY
You can create a category for your materials. Both in LiveDB and Local DB. Creating new category in Live DB is a little bit tricky. So you can check the article in "Download & Upload Material" section.
SELECT ALL MATERIALS
Selects all the materials in the corresponding category.
Allows to download the materials you choose. You can also download using other ways as we told you on the Interface menu.
replace actIve materIal
If you use this option while selecting Octane material in the material manager, your new material will replace the selected one.
SHow In explorer
Show the material you selected in windows explorer.