# XPP Help

## Writing ODE files

## Reserved words and functions

## Example ODE files

## Using the browser

## Using the animator

## AUTO

## Common commands

## Menu items

### (I)nitialconds

Initial conditions/Integration

### (C)ontinue

Continue an integration longer

### (N)ullcline

Draw Nullclines

### (D)ir.field/flow

Direction fields and flows

### (W)indow/zoom

Window and Zoom

### ph(A)sespace

Setting up toroidal phase-spaces

### (K)inescope

Making movies

### (G)raphic stuff

Graphics settings, keeping curves

### n(U)merics

Numerical settings/Post processing data, Poincare maps, etc

### (F)ile

Editing, saving, calculator,quitting, etc

### (P)arameters

Set problem parameters

### (E)rase

Erasing the screen

### (M)akewindow

Multiple windows

### (T)ext,etc

Drawing text and other objects in a window

### (S)ing pts

Computing fixed points and stability

### (V)iewaxes

Setting 2D and 3D views

### (X)i vs t

Plot a variable versus time

### (R)estore

Redrawing the window

### (3)d-params

Three-d parameters

### (B)ndryval

Running the boundary-value solver