Software Articles

April 18, 2010

Tips For Learning Adobe Illustrator

Filed under: Illustrator — Tags: , , , — admin @ 12:31 pm

People new to Adobe Illustrator often say that they find the program complex and hard work. When we hold Adobe Illustrator classes in London, we acknowledge the need to help delegates get rid of the belief that Illustrator is a difficult piece of software to use. We have found that there are three main aspects to showing users that Illustrator is no harder or more annoying than any other application.

To start with, we show them how to read and understand the extensive visual clues provided by the software as you perform various operations. Next, we keep reminding new users how easy it is to revert your drawing back to the way it was before things started going wrong. And, finally, we keep telling our students that they have to highlight the right tool to be able to perform a give operation.

If you a new user to a sophisticated program like Illustrator, you cannot be expected to avoid making errors: things may go a little awry or even get completely screwed up. The key thing here is to learn the power of the Undo command. For example, if you accidentally resize an object don’t try to manually change it back to the original size, simply go to the Edit menu and choose Undo or use the keyboard shortcut (Control-Z or Command-Z on Apple Mac). If you Undo too many times, you can always use Edit – Redo to move forward again. (The shortcut for the Redo command is Control-Shift-Z.)

If your whole drawing has gone seriously wrong, perhaps the easiest thing to do is to take it on the chin and choose the Revert command from the File menu. This is like saying “OK, I give up. This isn’t working!” File – Revert will discard every change you have made to the file since the last time you saved it and can be a very useful way of avoiding unnecessary frustration.

Another thing that phases new Illustrator users is when they find they are unable to carry out a certain operation because it can’t actually be done under the current set of circumstances or at that moment in time. For example, they might want to resize a shape and they end up rotating it or changing its position instead.

A simple way of avoiding this kind of problem is to keep an eye on the many visual clues that Illustrator gives you and, in particular, those that relate to the cursor. Let’s take an example. Say you are attempting to change the size of a circle, you can only carry out this operation if your cursor has changed to a diagonal line with an arrow at both ends thus showing you that have positioned the cursor precisely over one of the resize handles.

When manipulating objects, Illustrator newbies will often forget to first highlight the Selection tool. For example, they will draw a shape with, say, the Line tool and then, while the Line tool is still highlighted, they will attempt to move or resize the line they have just drawn or perhaps click on the page to deselect the line. They are then bemused and cross when little lines keep appearing on the page or Illustrator’s shape dimension window keeps on popping up.

This problem is easy to avoid. Always make sure that you are on the right tool. Thus, if you wish to manipulate an existing object, you have to ensure that the Selection tool is highlighted. One of the first keyboard shortcuts that we teach delegates who attend our Illustrator training courses is that you can temporarily activate the Selection tool by just pressing the Control key (or the Command key if you are using a Mac).

Click here for Adobe Illustrator classes in London.

April 10, 2010

How To Transform Adobe Photoshop Selections

Filed under: Computers — Tags: , , , , , — Chris Mason @ 7:42 am

Selections are a big deal in Adobe Photoshop. If your boss says to you, “Can we cut out this person and put them against a different background?”, there is no way that you can tell the program to do this. As far as a computer is concerned, your image is just a series of pixels. How easy or difficult it is to select the person will depend on how much contrast there is between them (or more likely their clothes) and the background scene behind them.

Having made an initial selection, you will often need to transform it in some way. Photoshop selections can be transformed in a manner not dissimilar to the way that objects are transformed in the vector environment. One key thing to remember is that in order for this transformation to work, one of the selection tools has to be active. If the Move tool is active, the pixels inside the selection will also be transformed.

The simplest form of transformation is movement. This can be done either by placing the cursor inside the selection and dragging or by using one of the cursor keys on the keyboard. Each time a cursor key is pressed, the selection will move one pixel in the direction specified. If the Shift key is held down while a cursor key is pressed, the selection will move 10 pixels in the given direction.

For other forms of transformation, choose Transform Selection from the Select menu. A bounding rectangle will then be displayed around the selection with handles similar to those found in vector drawing programs. You can drag the handles to resize the selection or drag just outside the handles to rotate. You can even hold down the Control key and drag the handles to distort your selection.

As well as these manual transformations, Photoshop’s Select menu also contains a number of automatic transformation commands. One of the most commonly used is feathering: Select – Feather. Feathering blurs the edges of a selection enabling the selected area to blend into the non-selected parts of the image. To access the other options go to the Select – Modify sub-menu. For example, the command Select-Modify-Expand allows you to increase the size of the selection by the number of pixels you specify. Naturally, there is also the reverse command: Select-Modify-Contract.

Click here for Photoshop training courses in central London.

April 2, 2010

Become A Magic Wand Wizard In Adobe Photoshop

Filed under: Photoshop — Tags: , , , — Chris Mason @ 8:34 pm

The Magic Wand is one of three tools in Photoshop which are dedicated to making selections. When I run courses on Photoshop, tools like the magic wand and the clone tools are usually the ones which everyone finds the easiest to start using because they give such immediate results. The Magic Wand works by selecting colours within the image adjacent and similar to any pixel that you click on. Pixels of dissimilar colour act as barriers to selection and so the selection ripples outwards from the point you click on.

Naturally, it’s quite rare to get a “hole in one” when you are using the magic wand to make selections. Typically, you will select part of the area that you want and you will then need to add and subtract from the selection, perhaps switching to the other selection tools from time to time. Photoshop offers you two ways of modifying a selection: you can either use modifier keys on you keyboard or activate the modifier icons on the options panel normally displayed below your menu bar.

To add to a selection, hold down the Shift key while clicking with the Magic Wand on a part of the image which is not yet selected. To subtract from the selection, hold down the Alt key and click on the part of the selection which you wish to deselect. The selection modifier icons are situated on the left of the options panel. There are four of them: new selection, add to selection, subtract from selection and select intersection. These icons effectively allow you to change selection mode on a permanent basis. Thus, for example, you could click on the second of the four icons when using the Magic Wand and click continually on different parts of a subject until it was completely selected.

If you want to select a subject against a uniform background such as a wall or the sky, a simple trick is to use the magic wand to select the background and then invert the selection by choosing Select – Inverse. A slight variation on this technique is to make a rough selection which completely encloses the subject as well some of the background and then to use the Magic Wand in subtract mode to remove the background from the selection.

The number of pixels which the Magic Wand selects when you click on part of the image can be controlled by changing a setting called tolerance. Tolerance determines how far a pixel can vary from the pixel that you click on and still be included in the selection. The default tolerance is 32 and the maximum is 255.


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