You should always be able to see your images when you click compose.

When your recipients receive your emails they should also see them. If not, their ability to view your images depends on their own webmail / email client image display settings - each platform (Gmail, Yahoo, Outlook, Iphone/Android etc.)  has it's own set of rules - Most of the platforms tend to show images of known and frequent emailed contacts as well as give the recipient of the email control over her ability to display images in her email.

iPhone  - Usually shows images by default , if your recipient can't review your signature image she might have to simply adjust her image display setup following these steps (see image below) :

  1. Click the My Settings icon.
  2. Under Settings on the left, select Mail, Contacts, Calendars.
  3. Under Mail on the right, go to Load Remote Images and slide the bar to display ON.
Gmail /Google Apps -
  1. Open the message.
  2. Click Display images below in the green box above your message. Or, if you'd like to always view images from a particular sender, click Always display images from sender@domain.com instead.

Outlook / Other

Here is an additional comprehensive list of how to enable email clients to display images by default  created by our friends and partners at ConstantContact.