Epson PhotoPC 850Z User Manual page 169

If you want to preview a selected image and confirm its
size, click the Preview checkbox. It takes a few seconds
longer to select images with previews displayed.
check here for helpful information
13-6 Using Your Camera for Presentations
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When you finish selecting image files, click Done to
close the Select Files dialog box. The selected images
appear in the Selected File List in the order they will
be uploaded. This determines the sequence in which you
can display the images.
To rearrange the uploading order, select the image
you want to reorder, then click Up or Down .
To remove files from this list, select the file(s) and
click Remove .
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For each file in the Selected File List , select an image
size from the Image Size box. The File Uploader will
resize your files during the transfer process.
If you want to save copies of the converted files on your
computer, click the Save file to checkbox. Click
Browse to open the Select Folder dialog box, then
select the folder where you want to save the files. Click
Select: to close the Select Folder dialog box. The folder
you selected is displayed to the right of the Browse
button.