- Updated/improved TIF loader
- Save dialog: if you write file extension, the right file type is selected
- New edit menu: Crop visible window area (incl. zoom)
- The internal selection code has been changed (to fix some rounding errors)
- New capture option: Object capture (with auto scroll, if possible)
- New button in Batch progress dialog: Return to batch (use same files again)
- New JPG save dialog option: Keep XMP data (from original JPG file)
- New command line option: /effect=(effect-nr,value1,value2)
Apply effect from Effects-Browser dialog, Example: Apply Blur of 30
i_view32.exe c:\image.jpg /effect=(1,30,0)
- New option in Print dialog: Auto rotate (based on image dimensions)
- New HTML dialog option: Create thumbs without frame/border
- Support for BLP format (BLP-2, Formats PlugIn)
- PSD loading bug/crash fixed (PSD bug reported by Secunia, thanks!)
- Fixed problem in "Create multipage PDF" dialog
- Batch conversion of multipage images to multipage PDF is now possible
(Advanced options work on the first page only)
- New image menu: Add border/frame (Thanks to Balazs from 530.hu)
- New edit menu: Create maximized current custom selection (using dialog values)
- New edit menus: Create maximized selection (for some standard ratios)
- Bigger "Browse for folder" dialog
- New option in Properties->Browsing: Beep on folder loop (or screenshot save)
- New option for external editors: Send all filenames in one call (Properties->Misc)
- New option in Postscript PlugIn/Dialog: Set custom Ghostscript DLL location
- Another Blur effect added (Total variation method, thanks to Daniel Marks)
- New option in Properties->Extensions->Icons: Leave current icon (for XP only)
- Hotkey CTRL + A can be used to select and unselect whole image (toggle)
- New fullscreen hotkey: CTRL + SHIFT + W: Stretch images over all monitors (toggle)
- Hotkey: CTRL + right mouse drag: scroll image even if Conext menu option activated
- Change in CTRL + Print key action: minimize IrfanView window before capturing
- New HTML template variables: #IMAGE_PATH#, #IMAGE_BASENAME#,
#IMAGE_EXT# and #SELF_LINK# (see help file, HTML Export page)
- Skin change problem on Linux/Wine fixed
- Some "Multipage images" menus moved from View to Options menu
- The hidden mouse in fullscreen/slideshow mode will be showed on mouse move
- New command line option: /random, can be used only with /wall
=> set random wallpapers, see "i_options.txt" for examples
- New feature for administrators: "DefaultLang" for INI file (set default language)
=> see FAQs for an example
- New Lossless JPG Dialog option: Perfect (error on non-perfect JPG images/sizes)
- New hotkey: SHIFT + Mouse-Wheel: scroll image horizontally
- New hotkeys: "=" for zoom in; CTRL + G = image->grayscale
- Several PlugIns are changed/updated, please install the newest versions:

Q: I am an administrator. How can I silently install/uninstall IrfanView?
A: Usually, you can download the ZIP version of IrfanView and Plugins and deploy the files.
Self install versions have special start options for silent install (examples, version 4.20):
1) IrfanView:

iview420_setup.exe /silent /folder="c:\test folder\irfanview"
iview420_setup.exe /silent /folder="c:\test folder\irfanview" /desktop=1 /thumbs=1 /group=1 /allusers=0 /assoc=1 /ini="%APPDATA%\irfanview"
iview420_setup.exe /silent /folder="c:\test folder\irfanview" /ini="c:\temp"

Options:
folder: destination folder; if not indicated: old IrfanView folder is used, if not found, the "Program Files" folder is used
desktop: create desktop shortcut; 0 = no, 1 = yes (default: 0)
thumbs: create desktop shortcut for thumbnails; 0 = no, 1 = yes (default: 0)
group: create group in Start Menu; 0 = no, 1 = yes (default: 0)
allusers: desktop/group links are for all users; 0 = current user, 1 = all users
assoc: if used, set file associations; 0 = none, 1 = images only, 2 = select all (default: 0)
assocallusers: if used, set associations for all users (Windows XP only)
ini: if used, set custom INI file folder (system environment variables are allowed)

2) PlugIns:

irfanview_plugins_420_setup.exe /silent

3) Uninstall:

iv_uninstall.exe /silent