Tips: Software is very user-friendly, if you want to convert the image files all gathered in a folder, you can choose "convert the selected files in the folder" to select this folder directly, and through "Convert File" to filter do not need to convert the image format (direct drop-down box, select the format you need can be, Figure 2).

Figure 2

Step2: set the PDF parameters

select the right image file, in respect of setting the parameters of the generated PDF documents. Click "Preferences" into the Settings dialog box (Figure 3), here you can on the paper size, page margins, page layout as a whole, DPI resolution, speed of compression algorithms and so on.

Figure 3