diff --git a/cmd/main/main.go b/cmd/main/main.go
index 89a04ce..cdf9402 100644
--- a/cmd/main/main.go
+++ b/cmd/main/main.go
@@ -130,8 +130,8 @@ func main() {
 				W:         9525,
 				SolidFill: &docx.ASolidFill{SrgbClr: &docx.ASrgbClr{Val: "000000"}},
 				Round:     &struct{}{},
-				HeadEnd:   &struct{}{},
-				TailEnd:   &struct{}{},
+				HeadEnd:   &docx.AHeadEnd{},
+				TailEnd:   &docx.ATailEnd{},
 			},
 		})
 
diff --git a/empty.go b/empty.go
index 340f679..0d674c5 100644
--- a/empty.go
+++ b/empty.go
@@ -35,6 +35,7 @@ func newEmptyA4File() *Docx {
 			XMLR:   XMLNS_R,
 			XMLWP:  XMLNS_WP,
 			XMLWPS: XMLNS_WPS,
+			XMLWPC: XMLNS_WPC,
 			// XMLMC:  XMLNS_MC,
 			// XMLWP14: XMLNS_WP14,
 			Body: Body{
diff --git a/id.go b/id.go
index 2721561..005e92a 100644
--- a/id.go
+++ b/id.go
@@ -2,7 +2,7 @@ package docx
 
 func (f *Docx) IncreaseID(name string) (n uintptr) {
 	f.slowIDsMu.Lock()
-	n, _ = f.slowIDs[name] //nolint: go-staticcheck
+	n = f.slowIDs[name]
 	n++
 	f.slowIDs[name] = n
 	f.slowIDsMu.Unlock()
diff --git a/structcanvas.go b/structcanvas.go
new file mode 100644
index 0000000..ada991e
--- /dev/null
+++ b/structcanvas.go
@@ -0,0 +1,127 @@
+package docx
+
+import (
+	"encoding/xml"
+	"io"
+	"strings"
+)
+
+type WordprocessingCanvas struct {
+	XMLName    xml.Name `xml:"wpc:wpc,omitempty"`
+	Background *WPCBackground
+	Whole      *WPCWhole
+
+	Items []interface{}
+}
+
+// UnmarshalXML ...
+func (c *WordprocessingCanvas) UnmarshalXML(d *xml.Decoder, start xml.StartElement) (err error) {
+	for {
+		t, err := d.Token()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return err
+		}
+
+		if tt, ok := t.(xml.StartElement); ok {
+			switch tt.Name.Local {
+			case "bg":
+				c.Background = new(WPCBackground)
+				err = d.DecodeElement(c.Background, &tt)
+				if err != nil && !strings.HasPrefix(err.Error(), "expected") {
+					return err
+				}
+			case "whole":
+				c.Whole = new(WPCWhole)
+				err = d.DecodeElement(c.Whole, &tt)
+				if err != nil && !strings.HasPrefix(err.Error(), "expected") {
+					return err
+				}
+			case "wsp":
+				var value WPSWordprocessingShape
+				err = d.DecodeElement(&value, &tt)
+				if err != nil && !strings.HasPrefix(err.Error(), "expected") {
+					return err
+				}
+				c.Items = append(c.Items, &value)
+			default:
+				err = d.Skip() // skip unsupported tags
+				if err != nil {
+					return err
+				}
+				continue
+			}
+		}
+	}
+	return nil
+}
+
+type WPCBackground struct {
+	XMLName xml.Name  `xml:"wpc:bg,omitempty"`
+	NoFill  *struct{} `xml:"a:noFill,omitempty"`
+}
+
+// UnmarshalXML ...
+func (b *WPCBackground) UnmarshalXML(d *xml.Decoder, start xml.StartElement) (err error) {
+	for {
+		t, err := d.Token()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return err
+		}
+
+		if tt, ok := t.(xml.StartElement); ok {
+			switch tt.Name.Local {
+			case "noFill":
+				b.NoFill = &struct{}{}
+			default:
+				err = d.Skip() // skip unsupported tags
+				if err != nil {
+					return err
+				}
+				continue
+			}
+		}
+	}
+	return nil
+}
+
+type WPCWhole struct {
+	XMLName xml.Name `xml:"wpc:whole,omitempty"`
+	Line    *ALine
+}
+
+// UnmarshalXML ...
+func (w *WPCWhole) UnmarshalXML(d *xml.Decoder, start xml.StartElement) (err error) {
+	for {
+		t, err := d.Token()
+		if err == io.EOF {
+			break
+		}
+		if err != nil {
+			return err
+		}
+
+		if tt, ok := t.(xml.StartElement); ok {
+			switch tt.Name.Local {
+			case "ln":
+				w.Line = new(ALine)
+				err = d.DecodeElement(w.Line, &tt)
+				if err != nil && !strings.HasPrefix(err.Error(), "expected") {
+					return err
+				}
+			default:
+				err = d.Skip() // skip unsupported tags
+				if err != nil {
+					return err
+				}
+				continue
+			}
+		}
+	}
+	return nil
+}
diff --git a/structdoc.go b/structdoc.go
index 28d4ddb..8ae78af 100644
--- a/structdoc.go
+++ b/structdoc.go
@@ -32,6 +32,7 @@ const (
 	XMLNS_R   = `http://schemas.openxmlformats.org/officeDocument/2006/relationships`
 	XMLNS_WP  = `http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing`
 	XMLNS_WPS = `http://schemas.microsoft.com/office/word/2010/wordprocessingShape`
+	XMLNS_WPC = `http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas`
 	// XMLNS_MC  = `http://schemas.openxmlformats.org/markup-compatibility/2006`
 	// XMLNS_WP14 = `http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing`
 
@@ -101,6 +102,7 @@ type Document struct {
 	XMLR    string   `xml:"xmlns:r,attr,omitempty"`   // cannot be unmarshalled in
 	XMLWP   string   `xml:"xmlns:wp,attr,omitempty"`  // cannot be unmarshalled in
 	XMLWPS  string   `xml:"xmlns:wps,attr,omitempty"` // cannot be unmarshalled in
+	XMLWPC  string   `xml:"xmlns:wpc,attr,omitempty"` // cannot be unmarshalled in
 	// XMLMC   string   `xml:"xmlns:mc,attr,omitempty"`  // cannot be unmarshalled in
 	// XMLWP14 string   `xml:"xmlns:wp14,attr,omitempty"` // cannot be unmarshalled in
 
diff --git a/structshape.go b/structshape.go
index b6770ec..46301ec 100644
--- a/structshape.go
+++ b/structshape.go
@@ -152,13 +152,18 @@ func (w *WPSSpPr) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
 
 // ALine represents a line element in a Word document.
 type ALine struct {
-	XMLName xml.Name `xml:"a:ln,omitempty"`
-	W       int64    `xml:"w,attr"`
+	XMLName  xml.Name `xml:"a:ln,omitempty"`
+	W        int64    `xml:"w,attr"`
+	Cap      string   `xml:"cap,attr,omitempty"`
+	Compound string   `xml:"cmpd,attr,omitempty"`
+	Align    string   `xml:"algn,attr,omitempty"`
 
 	SolidFill *ASolidFill
+	PrstDash  *APrstDash
+	Miter     *AMiter
 	Round     *struct{} `xml:"a:round,omitempty"`
-	HeadEnd   *struct{} `xml:"a:headEnd,omitempty"`
-	TailEnd   *struct{} `xml:"a:tailEnd,omitempty"`
+	HeadEnd   *AHeadEnd
+	TailEnd   *ATailEnd
 }
 
 // UnmarshalXML ...
@@ -170,6 +175,12 @@ func (l *ALine) UnmarshalXML(d *xml.Decoder, start xml.StartElement) (err error)
 			if err != nil {
 				return err
 			}
+		case "cap":
+			l.Cap = attr.Value
+		case "cmpd":
+			l.Compound = attr.Value
+		case "algn":
+			l.Align = attr.Value
 		default:
 			// ignore other attributes
 		}
@@ -191,12 +202,28 @@ func (l *ALine) UnmarshalXML(d *xml.Decoder, start xml.StartElement) (err error)
 				if err != nil && !strings.HasPrefix(err.Error(), "expected") {
 					return err
 				}
+			case "prstDash":
+				var value APrstDash
+				value.Val = getAtt(tt.Attr, "val")
+				l.PrstDash = &value
+			case "miter":
+				var value AMiter
+				value.Limit = getAtt(tt.Attr, "lim")
+				l.Miter = &value
 			case "round":
 				l.Round = &struct{}{}
 			case "headEnd":
-				l.HeadEnd = &struct{}{}
+				l.HeadEnd = new(AHeadEnd)
+				err = d.DecodeElement(l.HeadEnd, &tt)
+				if err != nil && !strings.HasPrefix(err.Error(), "expected") {
+					return err
+				}
 			case "tailEnd":
-				l.TailEnd = &struct{}{}
+				l.TailEnd = new(ATailEnd)
+				err = d.DecodeElement(l.TailEnd, &tt)
+				if err != nil && !strings.HasPrefix(err.Error(), "expected") {
+					return err
+				}
 			default:
 				err = d.Skip() // skip unsupported tags
 				if err != nil {
@@ -258,6 +285,72 @@ type ASrgbClr struct {
 	Val     string   `xml:"val,attr"`
 }
 
+// APrstDash ...
+type APrstDash struct {
+	XMLName xml.Name `xml:"a:prstDash,omitempty"`
+	Val     string   `xml:"val,attr"`
+}
+
+// AMiter ...
+type AMiter struct {
+	XMLName xml.Name `xml:"a:miter,omitempty"`
+	Limit   string   `xml:"lim,attr"`
+}
+
+// AHeadEnd ...
+type AHeadEnd struct {
+	XMLName xml.Name `xml:"a:headEnd,omitempty"`
+	Type    string   `xml:"type,attr,omitempty"`
+	W       string   `xml:"w,attr,omitempty"`
+	Len     string   `xml:"len,attr,omitempty"`
+}
+
+// UnmarshalXML ...
+func (r *AHeadEnd) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	for _, attr := range start.Attr {
+		switch attr.Name.Local {
+		case "type":
+			r.Type = attr.Value
+		case "w":
+			r.W = attr.Value
+		case "len":
+			r.Len = attr.Value
+		default:
+			// ignore other attributes
+		}
+	}
+	// Consume the end element
+	_, err := d.Token()
+	return err
+}
+
+// ATailEnd ...
+type ATailEnd struct {
+	XMLName xml.Name `xml:"a:tailEnd,omitempty"`
+	Type    string   `xml:"type,attr,omitempty"`
+	W       string   `xml:"w,attr,omitempty"`
+	Len     string   `xml:"len,attr,omitempty"`
+}
+
+// UnmarshalXML ...
+func (r *ATailEnd) UnmarshalXML(d *xml.Decoder, start xml.StartElement) error {
+	for _, attr := range start.Attr {
+		switch attr.Name.Local {
+		case "type":
+			r.Type = attr.Value
+		case "w":
+			r.W = attr.Value
+		case "len":
+			r.Len = attr.Value
+		default:
+			// ignore other attributes
+		}
+	}
+	// Consume the end element
+	_, err := d.Token()
+	return err
+}
+
 // WPSBodyPr represents the body properties for a WordprocessingML DrawingML shape.
 type WPSBodyPr struct {
 	XMLName xml.Name `xml:"wps:bodyPr,omitempty"`
diff --git a/structshape_test.go b/structshape_test.go
index 1b9a8bf..5f8eb7e 100644
--- a/structshape_test.go
+++ b/structshape_test.go
@@ -19,8 +19,8 @@ func TestShapeStructure(t *testing.T) {
 			W:         9525,
 			SolidFill: &ASolidFill{SrgbClr: &ASrgbClr{Val: "000000"}},
 			Round:     &struct{}{},
-			HeadEnd:   &struct{}{},
-			TailEnd:   &struct{}{},
+			HeadEnd:   &AHeadEnd{},
+			TailEnd:   &ATailEnd{},
 		},
 	})
 
diff --git a/unpack.go b/unpack.go
index 5e70e81..a955da2 100644
--- a/unpack.go
+++ b/unpack.go
@@ -84,6 +84,7 @@ func (f *Docx) parseDocument(file *zip.File) error {
 	f.Document.XMLWP = XMLNS_WP
 	// f.Document.XMLMC = XMLNS_MC
 	f.Document.XMLWPS = XMLNS_WPS
+	f.Document.XMLWPC = XMLNS_WPC
 	// f.Document.XMLWP14 = XMLNS_WP14
 	f.Document.XMLName.Space = XMLNS_W
 	f.Document.XMLName.Local = "document"