There is, in graphic and desktop publishing software, an incredible amount of different tools involved in the production of a specific application. They all have their own and special function. The ones you will employ for the creation of a graphic (graphic design software) or those involved in the production of a text (desktop publishing software) will be only applicable with a specific package.
A tool is, whatever the task (and the job), a device helping in the achievement of a duty. In a computerised application dealing with one of this two function, the kind of tools involved will be the drawing (traces of a particular line or shape) in a graphic design software and the text (inputs, chooses or changes the text from the publication) and the chart tool (embeds into the presentation) in desktop publishing software.
The drawing tools allow the user to draw lines or shapes, to affect the setting or to create a specific publication using special tools.
The line tool gives the opportunity to draw lines (can be continuous or twisted line). You can also, by a technique named rubber-banding, pull tightly (from any position on the line) to change its shape and, then, gave it a curved shape instead of the straight it had.
To actually position the line in a wanted place, the screen is divided into horizontal and vertical co-ordinates (numbers usually represented at the bottom left side corner of the screen). The area can either be symbolised in inches, centimetres, points or picas (the two first being probably the more practical and convenient to deal with because they both represent a unit already known).
With the shape tool you can draw most of the more common basic shapes existing (square, triangle, circle, rectangle or arrow). After the creation of a precise shape a frame will automatically surrounds it in order to mark the area. This invisible frame on a printed application (however viewable on the screen) is composed of handles (situated in corners and middles), which allows the user to stretch or contract the shape (with the middle handles) and increase or decrease the working area (with the corner handles).