742 AutoCAD and Its Applications—Basics Copyright Goodheart-Willcox Co., Inc. geometry. Figure 24-12 describes some of the basic commands available in the Block Editor ribbon tab. Parametric tools allow you to constrain block geometry and form block tables. Many of the commands and options found on the Block Editor ribbon tab relate to dynamic blocks. This textbook explains dynamic blocks, block tables, and other block editing tools in later chapters. When you fi nish editing, close the Block Editor to return to the drawing. If you have not saved your changes, a dialog box appears asking if you want to save changes. Pick the appropriate option to save or discard changes, or pick the Cancel button to return to the Block Editor. Figure 24-12. The Block Editor ribbon tab contains several tools and options specifically for editing and constructing blocks. This table describes the most basic functions. Button Description Saves changes to the block and updates the block definition. Opens the Save Block As dialog box, allowing you to save the block as a new block, using a different name. Opens the Edit Block Definition dialog box, which is the same dialog box displayed when you enter block editing mode. You can select a different block to edit or specify the name of a new block to create from scratch. Toggles the Block Authoring Palettes palette off and on. Closes the Block Editor. Figure 24-11. The context-sensitive Block Editor ribbon tab and the Block Authoring Palettes palette are available in block editing mode. Only the block geometry appears in the Block Editor. UCS origin located at the block insertion base point Block editing and construction tools available in the Block Editor ribbon tab Block Authoring Palettes palette Drawing area displays block geometry only