header: fixed
```css
.fixed-header {
  position: fixed;
  top: 20px;
}
```

header: sticky
```css
.sticky-header {
  position: sticky;
  top: 20px;
}
```

table-layout: fixed
```css
table {
  width: 100%;
  table-layout: fixed;
}
```

table-layout: auto/scrollable
```css
table {
  width: 100%;
  table-layout: auto;
}
```