XnView Software

Description: gradual zooming without a noticeable step.
Reasons:

• More natural (smooth) zooming of high resolution photos.
• Greater control of the zooming, because there is no fixed zooming step.

Proposed implementation: in view mode, when the + or - key is pressed a gradual zooming with a constant speed starts and when the key is released the zooming ends. In Tools -> Options -> General there is a keyboard/mouse mapping section, which can be extended to include the + and – keys.

Proposed implementation 2: in view mode, when the right mouse button is pressed and the mouse moved the image is zoomed instantly with an amount that depends on the horizontal offset of the mouse.