CHAPTER EXERCISES 1. Layer Properties Manager, Layer drop-down list, LayerP, and Make Object's Layer Current Open the sample drawing named FLOOR PLAN SAMPLE.DWG. Use the Explore Sample Drawings option in the Create section of the AutoCAD opening screen or otherwise locate the drawing located in the AutoCAD 2021/ Sample/Database Connectivity folder. Next, use Saveas to save the drawing in your working directory as DB_SAMP2. A. Invoke the Layer command in command line format by typing-LAYER or -LA. Use the ? option to yield the list of layers in the drawing. Notice that all the layers have the same linetype except one. Which layer has a different linetype and what is the linetype? B. Use the Layer drop-down list to indicate the layers of selected items. On the upper-left side of the drawing, PICK one or two cyan (light blue) lines. What layer are these lines on? Press the Esc key twice to cancel the selection. Next, PICK the gray staircase just above the center of the floor plan. What layer is the staircase on? Press the Esc key twice to cancel the selection. C. Invoke the Layer Properties Manager by selecting the icon button on the Ribbon or using the Format pull-down menu. Turn Off the CPU layer (click the light bulb icon). Select OK to return to the drawing and check the new setting. Are the computers displayed? Next, use the Layer drop-down list to turn the CPU layer back On. 256 Chapter 11 D. Use the Layer Properties Manager and determine if any layers are Frozen. Which layers are Frozen? Next, right-click for the shortcut menu and select the Select All option. Freeze all layers. Which layer will not Freeze? Select OK in the warning dialog box, then Apply. Notice the light bulb icon indicates the layers are still On although the layers do not appear in the drawing (Freeze overrides On). Use the same procedure to select all layers and Thaw them. Then Freeze the two layers that were previously frozen. E. Use the Layer Properties Manager again and select All Used Layers in the Filter Tree View area. Are there any layers in the drawing that are unused (examine the text just below the Filter Tree View)? How many layers are in the drawing? Select the All group in the Filter Tree View. F. Now we want to Freeze all the Cyan layers. Using the Layer Properties Manager again, sort the list by color. PICK the first layer name in the list of the four cyan ones. Now hold down the Shift key and PICK the last name in the list. All four layers should be selected. Freeze all four by selecting any one of the sun/snowflake icons. Select OK to return to the drawing to examine the changes. Next, use the LayerP command to undo the last action in the Layer Properties Manager. G. Assuming you wanted to work only with the Electrical layers (those beginning with "E-"). You can create a group filter to display only those layers. First, activate the Layer Properties Manager, then select the New Group Filter button above the Filter Tree View. Name the filter "Electrical." Next, select the All group to make the list of all layers appear. Then enter "E-*" (E, hyphen, asterisk) in the Search for Layer edit box below so only layers beginning with "E-" appear in the list. Select all those layers from the list, then drag and drop them into the new group. Next, in the Filter Tree View select the All group, then select the Electrical group again to ensure the group was created correctly. Press OK to close the Layer Properties Manager. Now examine the Layer drop-down list. Does it display only layer names beginning with "E-"? Return to the Layer Properties Manager and Freeze all layers not beginning with "E-" by check- ing the Invert Filter checkbox, then selecting and freezing all the layers that appear in the list. Press OK to see only the Electrical layers in the drawing. Use LayerP to undo the last action. Save the drawing. Save une drawing. H. In the Layer Properties Manager, remove the check in the Invert Filter checkbox. Then select the All group and ensure all layers are Thawed. Sort the list alphabetically by Name. Freeze all layers beginning with C and E. Assuming you were working with only the thawed layers, it would be convenient to display only those names in the drop-down list. Make a new Property Filter by selecting the New Property Filter button. In the Layer Filter Properties dialog box that appears, assign the new filter name "Thawed," then press the Tab key. In the Filter Definition area, select the "sun" icon in the Freeze column. Select OK and then examine the layer list. Select the All layer filter, then the Thawed filter to display the related names in the layer list. Next, Freeze the GRID-08 and GRIDLN layers. Note that the list of names in the Thawed filter changes since property filters are dynamic. Finally, Thaw all layers and return to the drawing. Save the drawing. 1. Next, you will "move" objects from one layer to another using the Properties panel. Make layer 0 (zero) the current layer by using the Layer drop-down list and selecting the name. Then using the Layer Properties Manager, right-click to Select All names. Freeze all layers (except the current layer). Then Thaw layer CHAIRS. Select OK and return to the drawing to examine the chairs (cyan in color). Use a crossing window to select all of the objects in the drawing (the small blue Grips may appear). Next, list the layers using the Layer drop-down list and PICK layer 0. Press Esc twice to disable the Grips. The objects should be black and on layer 0. You actually "moved" the objects to layer 0. Finally, type U to undo the last action so the chairs return to layer CHAIRS (cyan). Also, Thaw all layers. Layers and Object Properties 257 J. Let's assume you want to draw some additional objects on the GRIDLN layer and the E-F-TERR layer. Select the Make Object's Layer Current icon button. At the "Select object whose layer will become current" prompt, select one of the horizontal or vertical grid lines (gray color). The GRIDLN layer name should appear in the Layer box as the current layer. Draw a Line and it should be on layer GRIDLN and gray in color. Next, use Make Object's Layer Current again and select one of the cyan lines at the upper-left corner of the drawing. The E-F-TERR layer should appear as the current layer. Draw another Line. It should be on layer E-F-TERR and cyan in color. Keep in mind that this method of setting a layer current works especially well when you do not know the layer names or know what objects are on which layers. K. Close the drawing. Do not save the changes. 2. Layer Properties Manager and Linetype Manager A. Begin a New drawing and use Save to assign the name CH11EX2. Set Limits to 11 x 8.5, then Zoom All. Use the Linetype Manager to list the loaded linetypes. Are any linetypes already loaded? PICK the Load button then right-click to Select All linetypes. Select OK, then close the Linetype Manager. B. Use the Layer Properties Manager to create 3 new layers named OBJ, HID, and CEN. Assign the following colors, linetypes, and lineweights to the layers by clicking on the Color, Linetype, and Line weight columns. OBJ Red Continuous Default HID Yellow Hidden 2 Default CEN Green Center2 Default C. Make the OBJ layer Current and PICK the OK tile. Verify the current layer by looking at the Layer Control drop-down list, then draw the visible object Lines and the Circle only (not the dimensions) as shown in Figure 11-46. FIGURE 11-46 01.50 -2.50- 1.25 2.50 5.00 -1.00 1.00 1.50 2.00