7. Autodesk - ADI 4.2 Display Drivers
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currently viewing - the size of the image is determined by the AutoCAD logical drawing
space being used, 15-Bit or 31-Bit. The selection or pick box has an X through it. Move
the mouse/digitizer around to locate your pick box. If you can't see a small box moving,
click the left mouse button (the pick button) to size down the pick area. In size mode,
the pick box has a right pointing arrow in it (-->).
If the contents of the BP are too small to work with, you may increase the size of the
image in the window by pressing the
[+]
key on your numeric keypad. This performs
an incremental zoom within the BP. Likewise, pressing the
[-]
key reduces the size of
the contents of the BP. Pressing the
[Home]
and
[End]
keys puts the BP into its
smallest and largest size, respectively. The smallest BP size is defined as being exactly
the same view as that in the viewport referenced by the BP. The largest BP size is
defined as the largest image possible without causing a Regen.
The BP pick box is always proportioned to the proper aspect ratio for the current
viewport. Clicking the pick button again puts you back into the pick box move mode (X).
This operation is very similar to using the Zoom Dynamic feature of AutoCAD. Once
you have positioned the pick box on the area you would like displayed in the active
viewport, click any button other than the pick button to initiate the zoom, or press the
[Enter]
key. If you want to abort the operation, just hold any button down, other than
the pick button, until the BP disappears. You can also hit any key on the keyboard,
other than
[Enter]
, to cancel the BP.
Note that the BP is updated with new drawing commands, but moves or erases do not
update the image unless BPREFRESH is enabled. A DLDREFRESH or a REGEN
manually updates the BP with the current drawing changes.
DLDBPCACHE
Enables or disables TurboDLD
Classic's internal cache for BP features. This cache
speeds up TurboDLD
Classic's Big Picture functions. DLDBPCACHE is normally
disabled. Performance benefits of the BP Cache vary from one graphics platform to the
next. For example, on VGAs, the performance benefit of the BP Cache is as little as 1%.
When this command is issued from within AutoCAD, it overrides the selections made
during TurboDLD
Classic configuration for the current drawing session only. Exiting
AutoCAD and subsequently restarting causes all feature settings to revert back to those
selected in the TurboDLD
Classic configuration menu. If you wish to make the changes
permanent, reconfigure TurboDLD
Classic.
DLDBPDIM
Resizing and repositioning the BP is accomplished by typing this command at the
AutoCAD prompt. DLDBPDIM allows you to tell the driver where you want the BP
placed and how large you want it to be. The size is limited to being between one-quarter
and one-half the width of the display. This command functions like the pan/zoom
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