Go to Wiki.
Select the Wiki tool from the site Tool Menu.
Select Edit.
Select the Edit button to make changes on a wiki page.
Add attachment.
Select the Image/Attachment icon in the editor toolbar.
Select file.
Select the Select link for the file you want to attach if it is already in Resources.
If the file is not already in Resources, select Upload Files in the Add drop-down menu to browse for and select the file.
Select Continue.
Select the Continue button to confirm attachment upload.
Repeat as needed to attach additional files. (Optional)
View/edit links.
The attachment links will display in the editor area.
Tip: If you want to change the title of the link to something other than the filename, edit the link text before saving.
Preview content. (Optional)
Select the Preview tab at the top of the editing area to view the attachment before saving.
Select Save.
Select Save when editing is complete.