Formatting words

**The fonts and wordings in my journal’s editorial are large snd the line space large. **
I tried reducing the font and space in the original word document before pasting but the outcome is that the size and space do not match those in the original document. I searched the top bar but only bold, copy, paste, itallic, and underline are available. How can I reduce the font and line space?

I am using OJS

You can make these requests by creating a “Stylesheet”. You need to have some knowledge of CSS.