All screen-menu operations are driven with the left mouse button, with
the following exceptions:
(a) Text in the dialogue area and text boxes requires keyboard entry.
(b) Text strings saved in the cursor "cut" buffer may be "pasted" into
dialogue areas and text boxes using the middle mouse button.
The primitive "widgets" in the menu interface are used as follows:
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BUTTONS:
Screen buttons are depressed by clicking on them, but action only
takes place when the mouse button is released, so it is safe to
drag the (depressed) mouse around the screen.
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Buttons may also be greyed out to indicate that the option is not currently
available. Buttons with "
...
" after them
will usually invoke sub-menus.
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"Popup" window invocation
:
Buttons with an "
>
"
symbol may be selected normally with the left mouse button, but
if the
right
mouse button is depressed over them it will
invoke a "popup" window. Holding the right mouse button down move
the cursor into this window to make a selection, or move elsewhere
and release the button to deactivate the popup.
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SLIDERS:
Sliders are moved by clicking on the slider button itself, and
then dragging it to a new position. They may also be moved automatically
by clicking on, and holding down, one of the arrows at either end.
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TEXT BOXES:
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To enter text in a text box: first make it "live" by
clicking on it, then type in text, then type
<return>
to enter the string. Clicking on a "live" box
for a second time is exactly the same as typing <return>, so
clicking twice on a box effectively enters its current contents. You
can use the left and right arrow keys for line editing within a box:
text entry takes place after the current cursor position.
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RADIO BOXES
A "radio" set is provided where only one selection is possible
from a range of options. In this example the postscript laser output
has been set to a single image per page.
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MENU SELECTIONS:
Menus of items are used when you need to make one or more selections
from a (potentially) long list. Click on the row you want to select:
clicking on a row that is already selected will have the effect
of unselecting it. When the list is too long to display in the window
you can use the vertical scroll-bars to move up and down it.
A range of items may be selected by either
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1)
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Click on the first item and hold down the mouse
key, drag the mouse to the last item in the list. All items
between the first and last including the first and last are
selected.
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or
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2)
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Click on the first item, hold down the SHIFT key and click
on the last item in the list. All items between the first
and last including the first and last are selected.
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