We can email a drawing file to somebody maybe across country  even. So that they could see the plans, they could markup and send back to us.
            
                    DWGSee creates overlays for markups, so that all the markups  made by others will not infect the original drawing file. Markup overlays are saved  in a separate *.MRK file. To save the bandwidth or email attachment size, the  reviewer can just send back the *.MRK file and you can easily load it on your  drawing in DWGSee to see the remarks.
            
                    For this demonstration, you will have a glance of how DWGSee markup  collaborates and coordinates with the drawings.
                    
                        In DWGSee, measure and markup tools are stored in the markup menu  category. So that either it is a measurement or markup on screen, they will all  be stored in a same *.MRK file once you clicked the “Save Markup” button.
                
                        To open an existing markup, please go to “File” > “Open  Markup …”
                        To close an open markup, please go to “File” > “Close Markup…”
                        To save the current markup, please go to “File” > “Save Markup…”
                        
                    
                        
                    
                        The Measure tool measures the  distance between two points, takes the angle between two non-parallel lines or calculates  the radius of a circle, an arc, a curve or an arch. Instead of showing the  results on information panel, to add the measurements as markups on the  drawing, you will need to choose the following tools on the navigation bar.
                
                        
                    
                        To attract more attentions, you can  add callout markups. The Callout tool enables you to create a call-out shape  that points to a particular location in the drawing. You can enter text in the  call-out box to explain the call-out.
                        
                    
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                        The Text Box tool is similar to the Callout tool, except it is only a text box  that can be placed at any location on the drawing. You can enter text in the  text box.
                    
                    You  also have the option to use free-form drawing markup tools that are  meant to simulate actually drawing on paper. The drawing markups are divided  into three different types: Free Redline markup, Polyline markup and Rectangle  markup.