How do I remove a fill and leave only the outline in Inkscape?

I am new to any graphical editing software and I even do not know how can I formulate a question.

I have this:

And I would like to only have the outline (removing the fill):

How do I accomplish this?

Answer

You need to change the stroke and fill for the object.

Select the object and press Ctrl+Shift+F to open the Fill and Stroke window. On the Fill tab, change the fill to No Paint for transparent. On the Stroke paint tab, change the stroke to a solid color. If you want to change the thickness of the outline, go to the Stroke style tab, and change the width setting.