Agitprop, Part 3
“Paint” Logo (from Windows 7)
“Paint”
A programme for managing image files
There are many programmes that help people to do things with
image files. The most available one is “Paint”, which comes as part of the
Microsoft Windows operating system package. So, “Paint” is a good example to
use, because most people will already have it, on their computers.
What is an image, or graphics, file? It is an electronic
file that stores an image. Using such files, it becomes possible to insert
images into your text documents and into your e-mails, in just the same way as
the “Paint” logo has been used in this document (see above).
The ability to use images as well as text makes you into a
much better communicator. It also opens the door to graphic design for you.
Photographs are also stored in image files, so this item
applies to photos as well as to graphics such as logos.
File formats
Graphic images are stored by computer programs into files
with extensions like .BMP (“Bitmap”), .JPG (“J-peg”), .PNG, .GIF, and .TIF
(“Tiff”). Paint will open all these formats, and it can also save a file in a
different format to what it was originally. This is a useful thing to be able
to do.
The reason is that files have different characteristics. The
first consideration is file size. Bitmap files are usually very large. Hence
they are usually converted to one of the other formats before use, such as
JPEG.
The J-peg, or JPEG, is the most economical format. The file
sizes are very small, such that one may be able to insert several J-pegs in one
document, before the document becomes too large.
But the quality of the JPEG image is not always good. A good
compromise is PNG, which saves colours very well, but is not too large,
although usually larger than a JPEG.
Saving an image file is the same as saving any other kind of
file. It must have a name, and it goes in a folder, where it can be found again
when it is needed.
Cropping and
re-sizing
In “Paint”, you can crop an image, and you can re-size it.
The largest size you are likely to need for e-mails is 850 pixels across.
Cropping and re-sizing can produce a smaller file, which may be a better image,
as well. In Paint, to crop all four sides of an image, you will have to
“Rotate” it.
Inserting an image
into an e-mail
To be able to insert an image into a document or an e-mail,
and to be able to control its position there, is a giant step forward in your
computing life. In “Word” and in
“Outlook” you use the “Insert” tab and then the “Picture” icon. In Thunderbird
you use the “Insert” drop-down menu or icon, and select “Image”. In Gmail you click first the “+” sign at the
bottom of your e-mail box and then the little camera icon. Follow the procedure
to find the file you want to insert, from your hard drive.
Your image will go in where you left your cursor. If you
want to centre the image, select it and then click on the centre (text) icon.
You will be able to adjust the size of your image.
Getting and creating
more images
One way to get images is to use the “PrtSc” (“Print Screen”)
key on the keyboard. This causes the contents of the open screen to be held in
the “Clipboard”, from where it can be pasted into the screen of “Paint”, and
then saved as an image file.
This provides a way of reducing a poster, say, to an image
equivalent to an electronic flier that you could paste into an e-mail. The CU
relies on this technique, a lot.
Among other things, use of “PrtSc” gives you way to put
together a new composite image from existing images. You can use “Table” in
Word, and open images in different cells. This allows you to control the whole
“ensemble”. You can remove the cell borders. Then you can to a “PrtSC” and
paste the composite image in to “Paint”, and save.
Big sources of images are Google Images and Yahoo Images.
Don’t use other people’s images if they don’t want you to.
More tools in “Paint”
In “Paint” you can draw freehand, or use the given shapes and
lines. You can fill with colour. If you want to extend or reproduce a colour,
you can use the “Colour Picker” tool, and then the “Fill” thing.
You can open “Paint” more than once, i.e. you can have
different images open and you can select, copy and paste from one window to
another.
That’s about it. Paint does not have a lot of tools, but you
can do nearly everything you would normally want to do, with this useful little
programme that everybody has.
- To download any of the CU courses in PDF files please click here.
