You can share the required permissions to the person you are sharing the file with
1. Right click on the file, click on share
2. You can grant permission initially while sharing files on people while entering email
3. Go to edit file option drop down will open where you can limit the permission can view , can edit, can comment
4. Select any one which is required for you
5. Click Done button
Or
6. Click on advance, dialog box will open right click on the email address you want to share the file
7. Drop down list will appear, select the permission you want to give to the person you are sharing the file
8. Click on save change