Q:  What are the system requirements of Graph? 
A:  Graph requires Microsoft Windows 2000 or newer. It has been tested under Windows 2000, Windows XP, Windows Vista and Windows 7. 
Q:  Will Graph run under Linux? 
A:  Graph is a native Windows application and not tested under Linux, but several users have informed me that Graph runs without problems under Linux with Wine. 
Q:  Will Graph run on a Mac? 
A:  As with the above, you cannot run Graph directly on a Mac. However a bundle of Graph with Wine is available from the website. 
Q:  When will the next version be released? 
A:  When it is ready. 
Q:  How can I move the coordinate system? 
A:  When you hold down the Ctrl key you can use the arrow keys to move the coordinate system. You can also use → and drag the coordinate system around with the mouse. 
Q:  How can I easily zoom in and out? 
A:  When you hold down the Ctrl key you can use the + and  keys to zoom in and out. The scroll wheel on the mouse can be used for zooming at the position of the mouse pointer. When you move the scroll wheel up the program will zoom into the coordinate system and center the graphing area at the position of the mouse pointer. When you move the scroll wheel down the program zooms out. 
Q:  How do I save default settings? 
A:  Set the desired default settings in the Edit axes dialog, and put a mark in Save as default before pressing the button. Next time you create a new coordinate system, the saved default settings will be used. 
Q:  Can I make the program remember the size and position of the window? 
A:  When you select Save workspace on exit in the Options dialog. Graph will save the position and size of the main window when the program quits. The next time the program starts the same size and position is used. 
Q:  Why does the program not accept a comma as decimals separator? 
A:  I know a lot of countries use comma to separate the decimal part from the integer part, but Graph uses comma for separating function arguments. The program always uses a period to separate decimals from the integer value, no matter your local settings. 
Q:  How do I plot a vertical line? 
A: 
A vertical line can be drawn as a parametric function.
Select Parametric function as Function type when adding the function.
You can then add the vertical line at x=5 as 
Q:  How do I plot a function x=f(y)? 
A: 
To draw a function with y as the independent variable, you need to use a parametric function.
Select Parametric function as Function type when adding the function.
If you want to draw the function x=sin(y), you can now enter the function as 
Q:  How do I plot a circle? 
A: 
You need to use a parametric function to draw a circle.
When inserting the function, select Parametric function as Function type.
You can now add a circle with radius 5 and center in (2,3) as 
Q:  Why do circles look like ellipses? 
A:  That is probably because the axes are not equally scaled. You can either change the size of the window until the axes scales equally or select → in the menu to change the yaxis to scale equal to the xaxis. 
Q:  How do I calculate the area between two functions? 
A:  If you want to find the area between two functions f1(x)=3x and f2(x)=x^2, the easiest way is to create a new function that is the difference between the two functions: f(x)=f1(x)f2(x)=3xx^2. You can then use → to calculate the area for a given interval. 
Q:  How do I plot the inverse of any given function? 
A: 
You can use a parametric function for this.
If you want to plot the inverse of f(x)=x^{2}2x,
you can insert it as the parametric function 
Q:  How can I draw the negative part of f(x)=sqrt(x+2) ? 
A: 
For each value x, f(x) will evaluate to at most one value.

Q:  How do I plot a complex function like f(t)=e^(i*t)? 
A: 
You probably want to show the real part on the xaxis and the imaginary part on the yaxis.
In that case you can draw the function as the parametric function 
Q:  How can I make Graph plot functions with vertical asymptotes correctly? 
A: 
Functions like 
Q:  How to create a PDF file from Graph? 
A:  You can choose to save as PDF in the Save as image dialog. 
Q:  Why will the program not start under Windows 95? 
A:  Graph no longer supports Windows 95. The last version to run under Windows 95 was Graph 4.2. 