Sketch Board which supports unlimited canvas, vector high-definition scaling, text annotation is a convenient and efficient sketching and drawing tool .Drawing  lines follow the real world,give us a way to see the world.It provide two creating mode: Writing Mode Vs Paint Mode ,whick Writing is more faster and Paint is more colorful.The app also provide an image viewer and a video player, which provided many gestures supports,and let you edit the picture or snapshot quickly.
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PS:If you need to experience the full functionality, please upgrade to windows 10 18362 or above

Features
~Pure UWP application - simple and secure
~Vector stroke, infinite canvas, infinite zoom level
~Additional item annotations, supporting images, text, and links
~Writing and painting modes support different application scenarios

Functions:
#Brush
~Various brushes such as ballpoint pens, pencils, airbrushes, highlighters, pens, image brushes, etc
~Image brushes can be unlimited to meet creative needs
~Various brush parameters can be adjusted for pen tip width, height, etc
~Dot eraser,stroke eraser, soft transparent eraser

#Canvas
~Infinite canvas, borderless and can be painted and created from any position
~Infinite scaling, with unlimited scaling levels to grasp the global or focus on details
~Vector scaling, amplifying details without distortion

#Layer
~Infinite adding Canvas Layer
~Layer moving, merging, exporting, importing, etc
~Layer background image and background color support

#Select Tools
~Forward and reverse selection switching
~Select strokes and erase
~Choose to move or scale strokes
~Choose to copy strokes or copy as image

#Auxiliary lines
~Support grid auxiliary lines with adjustable spacing
~Support for perspective auxiliary lines, allowing for free adjustment of the number and position of poles

#Additional items
~Additional items can be added to the work, such as annotations and other related attachments
~Additional items support image, text, and link transformation for drawing notes

#Other functions or support
~Open PDF file
~Export the atlas as a PDF file

After downloading first time, the application immediately enters trial mode,you can have several times to experiment this app.
Paid subscription function:

1. No advertisements
2. Unlock layer function: unlimited layer support, layer export, layer copying
3. Unlocking soft erasers, spray brushes, image brushes, fill brushes
4. Unlocking selection editing tools: handwriting selection, copying strokes, copying images, cropping to new layers, moving, scaling, rotating, erasing
5. Unlock modification tools: replace brush styles, move strokes, adjust strokes
6. Unlock the selecting and transform tool、attachments
7. Unlocking import/export PDF file,Saving folder…