如果你使用了 概念，就會明白我們為什麼是向量而不是像素繪圖APP，我們希望用戶在繪圖之後能對所畫內容選取后進行調整。您可高效的選取后調整修改圖紙，最大程度節約時間。
我們有4種可以選中一條或多條線條的方法：
無論您透過上述的任何一種方式激活選取，熒幕底部都會彈出選取選單。選取選單可協助你從目標中過濾處想要選取的部分。無論何時選取，該選單都會顯示。
Item Picker, Lasso, Color Picker and their respective popups.
在選取選單中，根據激活的選項，從左至右有：
On the first, left-hand toggle is your Lasso. The lasso allows you to select items by dragging your finger across or around your strokes. Whatever the blue lasso touches will be part of your selection. Lasso again to subtract from the selection.
如果套選了內容，決定再添加一些線條，可以切換到元素選取器，然後繼續選取。
If you tap the Selection Type toggle again, you’ll find the Item Picker. This is a single item selection mechanism that allows you to add and subtract individual strokes to your selection.
將小十字拖到筆劃上，若需要選取單根線條，鬆手即可；若需要選取多根線條，使用另一隻手指點按熒幕來選取筆劃，然後移動到其他的筆劃上，重複該操作。
要使用元素選取器，只需將手指或觸控筆放在熒幕上，指尖或筆尖就會顯示小的十字或（+）。
When you touch the crosshairs to a stroke, a circle will appear, telling you it has located a stroke. Tap the screen to validate the stroke, and lift your finger from the screen. The stroke will be selected.
如果想在選取內容中添加筆劃，將小十字拖到下一根筆劃上，然後點按熒幕選取它。無論是否從熒幕上抬起手指，都可以選取任意數量的筆劃。
如果想從選取內容中移除筆劃，將小十字拖到已選取的筆劃上。會看到小十字變成減號（—）。點按熒幕接受移除。
The third Selection toggle is the Color Picker. This is a vector color picker with a few more capabilities than standard color pickers in other apps. It allows you to select and remember color, brush and stroke properties, and set them to your tools.
In addition to the Selection toggle, you can activate the color picker from the Color Wheel. Open the wheel, find the eyedropper, and tap it to use it.
When Color Picker is active, drag the circle with crosshairs across the screen. You’ll see the top half of the picker changes colors and transparency according to the character of the color beneath it, while the bottom half of the picker displays your active tool’s current color. When you let go of the color picker, the new color will be assigned to the tool.
In the selection menu at the bottom of the screen, you’ll see an option for “Alpha On”. This means the color reflected will be calculated as if the color were against a transparent background. It grabs the actual flat color without applying opacity to the brush
Finally, you’ll see a tool tag floating above the color picker. This tag recalls the exact tool you used to draw each stroke in your drawing. If you’re having trouble remembering which tool you used in what color, tap the tag and the tool will be applied to your tool slot.
You can find an illustrated tutorial about the Color Picker here.
當你選取一根或一組筆劃後，可以看到熒幕底部的選取選單出現更多有用的切換鍵。
To scale and rotate the selection, use a two finger gesture away from the four corner handles of the selection.
These handles are your Control Points. They allow you to distort, skew and warp your selection just by tapping a corner or two, and pulling with one or two fingers. They are excellent for tweaking size and shape to make your drawing proportions exactly right. They’re also helpful for aligning strokes, text or other images into your sketch’s perspective.
May the Force be with you.
Above the selection box is a Selection popup. This has many useful features you might use to adjust your strokes.
Clipboard. The clipboard copies your selection to your main device’s clipboard, just like when you copy text from an email or link. Tap Paste in any email, message, document editor etc. to paste in a transparent PNG version of your selection. Inside the app, you can find the clipboard from your Gallery, at the top of your current object library, from inside the Import menu → Imports, or just by a tap+hold on the screen. You can also attach colors from other apps to your clipboard, and access them on the Color wheel.
鎖住：鎖住選取內容后，可避免受到其他操作帶來的影響。你可透過重新選取或改變選取菜單的鎖定過濾來使用它。
複製：所選內容可多次複製。只需點按複製，即可快速準確的創建出迭代。拖動複製內容至新圖層，保留或隱藏原有選項，或進行新的迭代。
刪除：擦除向量筆劃最佳方法是刪除。概念 中的橡皮擦是蒙版工具。如果不喜歡所畫的筆劃，可使用刪除徹底擦除，或使用復原功能。
Group. This chain link button allows you to group all items inside your selection together, into a single “object.” You can then select the entire object with a single tap, instead of having to re-select multiple strokes. To separate them again, just select the object and tap the button again to ungroup them.
翻轉和鏡像：最後兩個按鈕可將選取內容水平翻轉或垂直鏡像，適合製作倒影。
Highlight selection allows you to clearly see the strokes you have selected. When you have an active selection, the selection maintains its actual colors and everything else is greyed. The active selection also pops to the front, meaning that if the stroke you selected is behind other strokes, it will be presented on top for as long as the selection is active. If you turn off Highlight Selection, the only thing differentiating the selection from other strokes is the bounding box.
You can also use Highlight Selection with the Nudge tool. When it’s turned on, you’ll see both before and after strokes as you nudge lines on your screen, with the original stroke slightly greyed out. Turn it off to only see the adjusted stroke.
You can turn Highlight Selection on or off in Settings → Gestures.
