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- CANVAS
-
- Due to the size of the programs on this month's Cover Disk
- it was impossible to include the Canvas documentation files on the
- same side as the program.
-
- Unfortunately this means that only double sided drive owners get to
- see the documentation. But don't worry as there is a tutorial inside
- the magazine and limited instructions can be found further on in this
- file.
-
- HOW TO USE THE DOCUMENTATION ON SIDE 2 OF THE DISK
-
- Ensure you've got a blank disk or a disk with about 150K free.
- Copy CANVAS.PRG to the root directory of the blank disk. Copy the
- MANUAL folder on side 2 of the disk to your blank disk. Ensure
- everything inside the folder is copied correctly. You should end up
- with a disk containing Canvas in the root directory and lots of
- ASCII files inside a MANUAL folder.
-
- Run Canvas from the new disk - it must be in drive A. Don't run Canvas
- from drive B or a hard drive otherwise you won't be able to read the
- documentation files.
-
- Once Canvas is up and running, hit the Help key. A menu will appear.
- Tap a letter on the keyboard to view the corresponding help file on
- screen.
-
- Please note not all help files are complete; you'll need the fully
- working commercial version for that.
-
- USING CANVAS
-
- Double click on the CANVAS.PRG file. A screen will appear full of icons.
- To use something like line drawing or box drawing, click on the appropriate
- icon.
-
- Before describing each individual menu type, you must realize the general
- interaction procedure with the menus...
-
- Anyone accustomed to using Degas or Degas Elite will already understand the
- principles since they are similar to those used in Canvas. While on the Main
- Menu screen (the screen which you are presented with when you load in
- Canvas), you may click on the right button to alternate between the current
- work screen and the main menu. The left button performs an operation - on the
- menus it selects a menu item whereas on the work screen it performs the
- current mode operation eg. Draw. On other menu screens the right mouse button
- may have other functions which are explained in the Menu Selector
- Descriptions section of this manual.
-
- Menu Selector Descriptions
-
- The ease of use of Canvas stems from the menu system developed
- specially for it. This system consists of a number of menu selector types
- described below:
-
- Action Bars
-
- These are simply boxes enclosing some text. By clicking the mouse button
- on them an action is performed. The nature of the action is different for
- each action bar.
-
- Colour Selectors
-
- The only Colour Selector Bar found on Canvas is located at the bottom of
- the Main Menu screen. It consists of the current palette of 16 (lo-res), 4
- (med-res) or 2 (hi-res) colours. Along the top and bottom of the colours run
- thin bars which contain the rotate markers. You will see at some point
- along each of them a marker. The top one indicates the start rotate marker
- and the one below shows the end rotate marker. The end marker must always be
- to the right of the start one, and you are prevented from setting them in any
- other fashion. The rotate markers serve as a selector for a number of
- functions. Obviously, they select which colours are cycled by the rotate
- function, but they also allow you to select which colours are used by the
- Rainbow options available to most of the modes.
-
- Icon Selectors
-
- This Menu type consists of of block of smaller options of which only one
- can be selected at a time. The mode selector on the Main Menu screen for
- instance can only have one mode selected at once. Icon Selectors may
- vary considerably: they may have different numbers of options in them
- both horizontally and vertically; they may contain simple text or icons
- (pictures). You can see which of the options has been selected since it is
- 'lit up', in otherwords, it has had a marker placed over the top of it which
- makes it easy to recognize. Some selectors may have title bars - do not
- confuse these with the actual options! They are separated from them by two
- horizontal lines close together right across the top of the selector. Title
- bars on other Menu types also occur and are similar in appearance.
-
- Infobars
-
- These are probably the most complicated Menu type since there are
- so many ways of using them. In brief they are a means of inputting a numeric
- value, which is displayed in the centre of the box. These are the methods of
- editing that value:
-
- 1) Clicking on the '<' or '>' signs causes the value to be brought to a
- minimum ('<') or maximum ('>') value possible for that particular infobar.
-
- 2) The arrow signs cause the value to be increased or decreased by one.
-
- 3) By clicking on the centre of the box where the value is displayed you
- are able to type in a new value. Three underscores will appear. Typing in the
- desired value and pressing the <Return> key causes the number to be changed and
- returns you to mouse mode. While typing in a number, the mouse is disabled.
- Note that only numeric values can be entered from 0 to 999.
-
- 4) On some Infobars you may find an extra box with a large left-pointing
- triangle on it. This shows that that Infobar holds a value representing an
- image. Since it is very difficult to work out the number of an image, the
- following method has been included: by clicking on the triangle portion of the
- Infobar, you will be able to select the desired image from the appropriate work
- screen. The image number is then displayed on the infobar - no messing!
-
- Multiple Icon Selectors
-
- These are very similar to ordinary Icon Selectors. The difference is that
- more than one item may be selected at a time ie. more than one may be 'lit'.
-
- Plus/Minus Bars
-
- These are all fairly obvious and consist of some text in the centre with
- a '-' on the left and a '+' on the right. By clicking with the left mouse
- button on the +/- signs you change the value they represent by one. The right
- mouse button changes the value by ten each time. Note that the value is not
- visibly changing anything on the P/M Bar but is most probably altering
- another menu type somewhere else on the screen.
-
- Shifters
-
- Note that some Shifters may not have the vertical arrows on them. By
- clicking on the bars with the arrows you are changing a value. The interior
- displays exactly what you are changing - it may be the size of someting or a
- fill pattern for instance.
-
- Special Selectors
-
- It is not possible to explain all the types of Special Selectors since
- they are all designed specifically for one menu item. Where a Special Selector
- occurrs an explanataion will be given in the Menu Item Descriptions section
- of this manual.
-
- Toggle Bars
-
- Toggle bars may appear to be very similar to Action bars. However, most
- of them do not perform an event as soon as you click on them. Instead they
- 'toggle' on and off. You can tell when it is on since it is 'lit' up.
-
-