This applies to ArticleLive 1.7 and up
If you edit the AuthorImage.html Snippet file located at /templates/{your template}/Panels/Snippets/ and change the line:
<img src="%%GLOBAL_siteURL%%/authorpics/%%GLOBAL_AuthorPictureName%%" %%GLOBAL_AddClass%% border='0' align='left'>
to
<img src="%%GLOBAL_siteURL%%/authorpics/%%GLOBAL_AuthorPictureName%%" %%GLOBAL_AddClass%% border='0' align='left' height='{your height}' width='{your width}'>
Make sure to add the specific height/width in place of {your height} and {your width}.

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