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Ham Radio 2000 #2
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Ham Radio 2000 - Volume 2.iso
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EDIT.TXT
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1996-03-13
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Edit Menu
---------
The Edit menu contains the Undo command and Clipboard functions.
Undo
----
Most commands first save away a copy of the current image.
You can generally undo the effect of the most recent operation
by picking "undo" from the Edit menu or pressing the "Esc"
key.
Performing undo again will undo the undo. Sounds confusing
but it isn't. After performing some sort of image processing
function this can be used to toggle back and forth between
the before and after states.
Copy
----
This makes a copy of the currently selected region and places
it on the "clipboard." From here you can "Paste" it into
other images or write it to a file.
To select a region:
Click on the "select" icon in the paint tool box. This is the
one with the rectangle with dashed lines. Move the mouse
pointer to one corner of the desired region. Hold down the
left mouse button while dragging the pointer to the opposite
corner of the desired region.
Paste
-----
This copy the contents of the Clipboard to the corner of the
current image. The cursor turns to a hand shape, indicating
that you can grab the image and drag it to the desired
location.
To position the pasted image:
Place the hand cursor somewhere in the pasted image. Press the
left mouse button and hold it down while dragging the image to
the desired location. You only get one chance so don't
release the mouse button until the image is in the proper
position.
Paste Transparent
-----------------
This is the same as Paste except the background color is
changed to transparent. The background color is determined
automatically by looking at the average color on the edges
of the image on the clipboard. Results probably won't be
satisfactory unless this is fairly consistent.
Here is an example of how you might use it.
1. Place a toy carnivorous dinosaur against a blue
background and get a picture of it with your TV camera
and frame grabber.
2. Click on the Select icon in the paint tool box.
3. Imagine a rectangle large enough to enclose the dinosaur.
Place the cursor in one corner of that imaginary rectangle,
press the left button, and drag the cursor to the
opposite corner. Finally, release the button.
4. Pick Copy from the Edit menu.
5. Get a picture of yourself looking scared.
6. Pick Paste Transparent from the Edit menu. The dinosaur
will appear in the upper left corner and the cursor changes
to a hand shape.
7. Place the hand cursor on the dinosaur. Press the left mouse
button and hold it down while dragging the dinosaur to a
position where it is about to attack you. Release the
button.
Notice that the blue background of the pasted image became
transparent. The background color doesn't have to be blue.
Any color will do but it should be fairly consistent for best
results. Normally the background color should be substantially
different than any color in the subject. However, you might
want part of the subject to be made transparent.
Tile
----
Similar to Paste except it completely fills the image with
copies of the clipboard content. The term comes from filling
a wall or floor with tiles all pushed together.
Tile Transparent
----------------
Same as Tile except the background color is made transparent.
Open to Clipboard
-----------------
This is used to read an image file directly to the clipboard.
The Open on the File menu always rescales an image to fit in
the 640 x 480 work area sometimes stretching it as required
to completely fill the space.
Open to Clipboard maintains the original size and aspect ratio.
Save from Clipboard
-------------------
This writes the Clipboard contents to a file.
Save on the File menu always creates a file with a size of
640 x 480 or 320 x 240.
When writing an image file from the Clipboard it can be any
size and shape. The combination of Open to Clipboard and
Save from Clipboard can be used to convert from one file
type to another without changing the image size.