=== Basic View Operations ===
When you start [[EM.Cube]], the default grid cell size is set to 5 units. The default view may not be good enough for very small or very large structures. You can easily change the view settings as you desireof the project workspace. The simplest view operation is zooming in or out. This can easily be done using the scroll wheel of your mouse. Turning the scroll wheel towards yourself zooms out of a structure, while turning it away from yourself zooms into in to the structure. Zooming in and out using the mouse scroll wheel is a temporary operation and does not change the "View Mode"view mode. [[EM.Cube]] provides a number of View Modesview modes, which persist until you change the mode or return to the '''Normal Mode'''. You can always return to the normal mode using the '''{{key|Esc''' }} (Escape) key of your keyboard. You can also return to the normal mode by clicking the '''Select''' [[File:select-tool_tn.png]] button of the '''View Toolbar''' or selecting the menu item '''Menu > View > → Normal View'''.
Most view operations can be accessed either from the '''View Toolbar''' or from the '''View Menu'''. One of [[EM.Cube]]'s persistent view modes is the '''"Dynamic Zoom Mode''' " and it can be activated by clicking the '''Zoom Dynamic''' [[File:zoom-tool_tn.png]] button of the '''View Toolbar'''. In this mode you can continuously zoom in or zoom out by dragging the mouse around in the project workspace. You can pan the view by dragging the right mouse button (RMB)in the workspace while holding the '''{{key|Shift Key''' }} key down. Again, this is a temporary state and as soon as you release the right mouse button, the view operation ends. Alternatively, you can click the '''Pan''' [[File:pan-tool_tn.png]] button of the '''View Toolbar''' to enable the '''"Pan Mode'''". In this case, the shape of the cursor changes to a hand, and [[CubeCAD]] the program stays in the Pan Mode until you return to the Normal Modenormal mode.
Another very useful view operation is '''"Rotate View'''". You can change your viewing angle towards the structure and examine it from different directions. You can rotate the view very easily by simply dragging the right mouse button (RMB)in the workspace. This, too, is a temporary state and as soon as you release the right mouse button, the rotate view operation ends. Another alternate, temporary, view rotation can be accomplished by dragging the right mouse button (RMB)in the workspace while holding the '''Alt Key''' down. Alternatively, you can click the '''Rotate View''' [[File:rotate-tool_tn.png]] button of the '''View Toolbar''' to enable the '''Rotate View Mode'''. In this case, the shape of the cursor changes to two circular arrows, and [[EM.Cube]] stays in the Rotate View Mode until you return to the Normal Mode. You can also activate the Rotate View Mode by selecting '''Menu → View → Rotate View'''. While in the Rotate View Mode, you can perform two different rotation operations depending on whether you drag the left or right mouse buttons.
You can perform a number of zoom operations in [[EM.Cube]]'s project workspace. One of the most widely used tools is '''Zoom Extents'''. This tool automatically zooms to fit the whole structure into the main window. You can access this tool from '''Zoom Extents''' button [[File:zoom-to-extent_tn.png]] of '''View Toolbar''', or by using the keyboard shortcut '''Ctrl+E'''. Sometimes you may prefer to zoom on a certain part of a structure. In this case, you should use the '''Zoom Window''' tool, which can be accessed from '''Zoom Extents''' button [[File:zoom-to-area_tn.png]] of '''View Toolbar''', or by using the keyboard shortcut '''Ctrl+W'''. Once this tool is enabled, draw a selection box around all the objects that you would like to zoom to. The view size is adjusted to fit the selected area. You can also zoom to one or more selected objectsusing the '''Zoom Selected''' tool.