Converting images to pdf in Trekker
Just as with PDF files you can then choose to process the selected image(/s) by itself (by selecting the "Save" icon) ; or you can add it to the PDF join list ( by selecting the "Add Pages to Join List" icon). Once processing begins the "Convert Image to PDF" dialog will open, this dialog allows you to select a number of conversion factors including, the size of PDF page, the page margins, the image DPI limit (100 dpi or even 72 dpi, will usually be good enough for purely printing purposes). The original page orientation will be set according to the image dimension (which will be the best fit), however the dialog also allows you to change the page orientation if desired.
It is important to note that if you are converting multiple images (e.g from a multi-page tiff) only the first image will be shown in the conversion dialog, but the settings used in the dialog will apply to all the images processed. It is recommended when doing multiple images that they all be of a similar aspect or else the results may not be as expected. Otherwise, for best results, you can process the images separately, and use the "Add Page/s to Join List" icon to add them to a PDF join list, that can then be later saved as a final pdf file.