Draw the straight line, then select the trimming frame, and cut the straight line. You can also clean the canvas.

Filename	Size	Update
xx_CS2\.vs\xx_CS2\v14\.suo	52736	2017-01-05
xx_CS2\xx_CS2\App.config	184	2017-01-05
xx_CS2\xx_CS2\bin\Debug\xx_CS2.exe	20992	2017-01-05
xx_CS2\xx_CS2\bin\Debug\xx_CS2.exe.config	184	2017-01-05
xx_CS2\xx_CS2\bin\Debug\xx_CS2.pdb	36352	2017-01-05
xx_CS2\xx_CS2\bin\Debug\xx_CS2.vshost.exe	22696	2017-01-05
xx_CS2\xx_CS2\bin\Debug\xx_CS2.vshost.exe.config	184	2017-01-05
xx_CS2\xx_CS2\bin\Debug\xx_CS2.vshost.exe.manifest	490	2010-03-17
xx_CS2\xx_CS2\Form1.cs	31526	2017-01-05
xx_CS2\xx_CS2\Form1.Designer.cs	21717	2017-01-05
xx_CS2\xx_CS2\Form1.resx	6017	2017-01-05
xx_CS2\xx_CS2\obj\Debug\DesignTimeResolveAssemblyReferences.cache	864	2017-01-05
xx_CS2\xx_CS2\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache	7100	2017-01-05
xx_CS2\xx_CS2\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs	0	2016-12-29
xx_CS2\xx_CS2\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs	0	2016-12-29
xx_CS2\xx_CS2\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs	0	2016-12-29
xx_CS2\xx_CS2\obj\Debug\TempPE\Properties.Resources.Designer.cs.dll	4608	2017-01-05
xx_CS2\xx_CS2\obj\Debug\xx_CS2.csproj.FileListAbsolute.txt	2196	2017-01-05
xx_CS2\xx_CS2\obj\Debug\xx_CS2.csproj.GenerateResource.Cache	1012	2017-01-05
xx_CS2\xx_CS2\obj\Debug\xx_CS2.csprojResolveAssemblyReference.cache	2360	2017-01-05
xx_CS2\xx_CS2\obj\Debug\xx_CS2.exe	20992	2017-01-05
xx_CS2\xx_CS2\obj\Debug\xx_CS2.Form1.resources	180	2017-01-05
xx_CS2\xx_CS2\obj\Debug\xx_CS2.pdb	36352	2017-01-05
xx_CS2\xx_CS2\obj\Debug\xx_CS2.Properties.Resources.resources	180	2017-01-05
xx_CS2\xx_CS2\Program.cs	518	2016-12-29
xx_CS2\xx_CS2\Properties\AssemblyInfo.cs	1338	2016-12-29
xx_CS2\xx_CS2\Properties\Resources.Designer.cs	2852	2017-01-05
xx_CS2\xx_CS2\Properties\Resources.resx	5612	2016-12-29
xx_CS2\xx_CS2\Properties\Settings.Designer.cs	1106	2017-01-05
xx_CS2\xx_CS2\Properties\Settings.settings	249	2016-12-29
xx_CS2\xx_CS2\xx_CS2.csproj	3977	2017-01-05
xx_CS2\xx_CS2.sln	985	2016-12-29
xx_CS2\xx_CS2.v12.suo	28672	2017-01-05
xx_CS2\xx_CS2\obj\Debug\TempPE	0	2017-01-05
xx_CS2\.vs\xx_CS2\v14	0	2016-12-29
xx_CS2\xx_CS2\bin\Debug	0	2016-12-29
xx_CS2\xx_CS2\obj\Debug	0	2017-01-05
xx_CS2\.vs\xx_CS2	0	2016-12-29
xx_CS2\xx_CS2\bin	0	2016-12-29
xx_CS2\xx_CS2\obj	0	2016-12-29
xx_CS2\xx_CS2\Properties	0	2016-12-29
xx_CS2\.vs	0	2016-12-29
xx_CS2\xx_CS2	0	2017-01-05
xx_CS2	0	2017-01-05

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