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May Day is approaching, and I would like to wish everyone a happy holiday in advance! It is said that labor is the most honorable, but to work more efficiently, certain methods and techniques are needed! Next, I’ll use the Haochen CAD software as an example to share some CAD drawing tips with you! CAD Drawing Tip 1: Importing and referencing files in multiple formats – In a drawing file opened using the HaoChen CAD software, click on \"Insert\", then find \"Raster Image Reference\" in the drop-down menu and click on it to select the reference file. In the selection of reference files, find the location where you saved the image; after selecting it, click to open it again. Move the mouse on the screen to determine the insertion point, then click the left mouse button. At this point, select the size of the image to insert; once the appropriate size has been chosen, click the left mouse button again to confirm. CAD Drawing Tips 2: Editing PDF Documents Directly – Haicheng CAD also supports referencing and editing files in various formats such as DWF, DGN, and DWG. During the design process, we often encounter reference graphics in PDF format; therefore, it is particularly important that CAD software supports direct editing of PDF documents, which greatly improves work efficiency. CAD Drawing Tips 3: Quickly Editing Raster Images. If the imported PDF document contains images, simply check the raster image option in the PDF management interface. Linear graphics can be directly decomposed and edited ； But how can raster images be edited quickly? Taking obtaining the scythe and hammer in the image as an example: first, the outline of the graphic is quickly drawn using polylines. Enlarging the graphic outline can improve accuracy. Based on polylines, the model is drawn using functions such as arcs and straight lines. If numerical values are indicated, the graphics can be edited more precisely. By filling in the corresponding colors, the conversion of the raster image into a geometric shape is completed quickly, allowing us to make any desired modifications and edits. The above are some practical CAD tips compiled by the editor for use while drawing with the HaoChen CAD software; I hope they will be helpful to everyone~