You cannot develop or edit tiff file with multiple pages. Please split this type of tiff file to single page tiff and then develop or edit each single tiff file.

To split the multi-page tiff into single page ones, please use the following step

• Select the tiff file in the manage mode and click Tools | Batch | Convert File Format...
• Select TIFF in the list under the Format Tab
• Click Next to Set Output Options
• Click Next.
• In the Set Multiple page options window, choose Split option
• Click Start Convert button

The multi-page tiff file will be converted to single page ones.