· Use resampling when scaling If set, PMView will scale the displayed image using a pixel average method. Using resampling is slower, but gives a far better result. For instance, if you zoom an image by a factor of four (400%), 4x4 pixel squares may be visible if no resampling is used.
· Adjust gamma Enable this control if you need to adjust the gamma factor used when PMView draws the image to the screen. Enabling this option will make the painting to screen slower. Whether this is noticeable or not depends on your hardware.
· Use smooth keyboard scrolling If not set, PMView will do a normal stepped scroll (in 32 pixel increments) for each key press. If the key is kept down, the system keyboard repeat rate determines how fast scrolling happens. Since scrolling happens in 32-pixel increments, the image will appear to "jump" and not scroll smoothly. Also, the limited keyboard rate may not give the desired scroll rate. If set, PMView will do smooth scrolling. In this case, PMView does not rely on the keyboard repeat rate. When a scrolling key is pressed, PMView starts scrolling and stops when the key is released. The image is scrolled in as small increments as possible to keep scrolling smooth.
· Speed This lets you control the scrolling speed. The speed is expressed as the number of pixels to scroll per second.
· Latency This lets you control the amount of pausing necessary between scrolls in milliseconds. Ideally, this should be set to zero (0 ms) since that gives the smoothest possible scrolling. However, depending on your hardware and software configuration, this may not be possible. On some systems a setting lower than the default (20 ms) causes buffer starvation and results in uneven scrolling.
· Accelerate to speed If set, scrolling starts out at one third of the set speed and then accelerates until the set speed is achieved. (The acceleration rate is fixed at a third of the set speed, i.e speed/3 pels/s).