How can I insert two images side by side in a Paper document?

Hi I'm SO new to use Dropbox.

I'd like you all to teach me how to make a good document.

 

I wanna know about those below.

1. How to insert 2 or more pics side by side.

    I tried to put the other pic next to the first pic i inserted,

    but it always goes to another line like below or above.

 

2. How to change inserted pics sizes.

    I wanna insert pics in same size side by side,

    but always one pic is bigger and the document looks not professional.

 

it'd be appreciated if there's any helpful tips too! 

 

Thank you.