Go to Leads tab>Campaigns. Select Campaign Manager.
Select the Manage Emails tab.
Below select the Manage Images tab.
Here is where you can select an existing image from your computers library, by clicking the Select button.
Make sure the images are the size that you want them when they are imported.
If you wish to add more than one image click the Add button, which will reveal more task bars to add images.
Choose your image, then click Upload.
Once you have uploaded your image you will see it stored at the bottom of your scree. Now when you are creating emails you will be able to drag and drop that image in your email.