Replacing images is done in the "Attachments" page. This is the easiest, safest and quickest method to replace images.
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Title
text text text text text text text text text text
Name
Title
text text text text text text text text text text
Name
Title
text text text text text text text text text text
Name
Title
text text text text text text text text text text
Name
Title
text text text text text text text text text text
Name
Title
text text text text text text text text text text
Name
Title
text text text text text text text text text text
Name
Title
text text text text text text text text text text
Name
Title
text text text text text text text text text text