The following features are new in PMView v3.70:

General: Alpha channel read/write/display/convert support has been added. This new feature lets PMView properly handle presentation and cross-conversion of transparency in the following formats: BMP, CUR, GIF, ICO, PNG, PTR, TGA, TIFF, and XPM

Loading, BMP: RLE4-encoded bitmaps with 1 bits per pixel can now be read.

Loading, BMP: Additional format specific info has been added in the File Info dialog.

Loading, TGA: TGA v2.0 extended information is now available in the File Info dialog.

Saving: New save option "Transparent" in the File Save dialog and file conversion script.

Saving, PNG: Optimized PNG GrayScale saving to allow generation of 2- and 4-bit grayscale images.

Saving, PNG: New PNG save options "Use transparent color if possible" and "Allow use of palette for grayscales".

Saving, Windows ICO, CUR: Saving of 256x256 icons and cursors is now possible.

Saving, ICO, CUR, PTR: Added new option "Resize if smaller" and a new color option "Automatic, adaptive palette".