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To make the most of Inventor we need to change how we look at the drawing. If you press F6 on your keyboard you will be shown the rectangle in Isometric view. You can also do this by going to : View> Isometric View
In this example we are going from a shape to a form by extruding. This means taking the rectangle and stretching it through the 3rd dimension, think of it like squashing icing through a piping bag...
Click the Extrude tool in the Panel Bar, it is top left. Because we've only got one shape drawn Inventor assumes this is the shape to extrude and it gives us a preview like on my screen.
Later we will have to choose the 'Profile' ourselves. For now try out the different options on the Extrude menu, and see the next few screens for what you can change, but don't click OK yet!
Go back to isometric view by pressing F6 - this will move the part back to Isometric view and also zoom to an angle that will show you the whole part.
On the left you will find the Browser panel. If you need to click the plus sign beside "Extrusion 1" then mouse over Sketch 1. You will see that the rectangle we drew is highlighted. If we double click "Sketch 1" we will be able to go back and make some changes, do this now.
Now we are back in Sketch mode. Drawing quickly and roughly like we did before is fine, but we usually want to be more accurate than that. We are going to use Constraints to shape our rectangle more accurately.
First press F6 on your keyboard to get into isometric view, this will help you get your screen to look like mine.
In your Panel Bar again click the General Dimension tool. then click once on the edge shown then move the mouse away and click again. Your screen should look like mine.
Play with surface properties to change the appearance of the domino, play with the Fillet tool to make the edges rounder and then try something else, a dice is a nice easy progression, or you could try something harder like your mobile phone.
So far we have been in Sketch mode - this means we have only been drawing in 2D. We now want to make our 2D shape (a rectangle in this case) into a 3D Form (here it will be a cuboid).
To do this we must leave sketch mode, we do this by clicking Return on the top menu panel, it is towards the left, beside undo. Once you've clicked it your screen should look something like mine.
Notice how the options in the Panel Bar change when you go from sketch mode to part mode